Если Вам удобно, посоветуйте мне салон, где делают хороший маникюр и не заставляют долго ждать.

Если Вам удобно literally means If it is convenient for you.

This is a very common polite Russian way to soften a request. Instead of directly saying Recommend me a salon, the speaker adds a kind of buffer:

• Если Вам удобно... = If it’s convenient for you...
• natural English equivalent: If you don’t mind..., If it’s convenient...

A few grammar notes:

• если = if
• Вам = to you / for you (dative case)
• удобно = comfortable / convenient

Russian often uses this kind of impersonal construction:

• Мне удобно = It’s convenient for me
• Вам удобно = It’s convenient for you

So the sentence is not literally saying If you are comfortable, but rather If it’s convenient for you.

Capitalized Вам is a politeness convention in writing.

Russian has:

• ты / тебе / тебя for informal singular you
• Вы / Вам / Вас for formal singular you or plural you

When writing to one person politely, Russians often capitalize the formal pronoun and its forms:

• Вы
• Вам
• Вас

So Если Вам удобно is extra polite in written form.

Important:

• In modern Russian, capitalization here is common but not absolutely required in every context.
• It is usually used in letters, messages, customer communication, and other respectful situations.

Yes, посоветуйте is the formal plural imperative of посоветовать.

It means:

• recommend
• please recommend
• give me a recommendation

Why this form?

Because the speaker is addressing someone politely with Вы, so the imperative must match that:

• посоветуй(те) is from the verb посоветовать
• посоветуйте = recommend (you, formal/plural)

Compare:

• Посоветуй мне салон. = Recommend a salon to me. (informal, to one person)
• Посоветуйте мне салон. = Recommend a salon to me. (formal, or to more than one person)

Also, the verb is perfective (посоветовать), which often sounds right for a single completed request:

• please give me one recommendation

Because посоветуйте and советуйте do not mean exactly the same thing.

• посоветуйте (perfective) = recommend / give a recommendation
• советуйте (imperfective) can sound more like be recommending, recommend in general, or even keep advising

In requests for one concrete action, Russian often prefers the perfective imperative:

• Посоветуйте врача. = Recommend a doctor.
• Подскажите адрес. = Tell me the address / point me to the address.
• Напишите мне. = Write to me.

So посоветуйте мне салон sounds like: Please recommend a salon to me.

Мне is the dative case of я.

With посоветовать, the person receiving the advice is usually in the dative:

• посоветовать кому? = to recommend to whom?

So:

• посоветуйте мне салон = recommend a salon to me

Breakdown:

• посоветуйте = recommend
• мне = to me
• салон = salon

This is a very common pattern:

• Посоветуйте мне книгу. = Recommend a book to me.
• Посоветуйте мне фильм. = Recommend a movie to me.

Салон here means a beauty salon or nail salon, depending on context.

Since the sentence mentions маникюр, the meaning is clearly something like:

• a salon where they do good manicures

Why not парикмахерская?

• парикмахерская usually means a hair salon / barber / hairdresser’s
• a place focused mainly on hair

Why салон works well:

• салон красоты = beauty salon
• in casual speech, people often shorten this to simply салон if the context is clear

So салон here is natural because manicure is a beauty-service context.

Because when talking about a place, Russian very often uses где = where.

So:

• салон, где делают хороший маникюр = a salon where they do good manicures

This is very natural in Russian.

You could also use a relative clause with в котором:

• салон, в котором делают хороший маникюр

That is also correct, but:

• где sounds simpler and more conversational
• в котором sounds a little more explicit or formal

Why not который делает? Because the salon itself is not literally doing the manicure; the people working there do it. Russian usually expresses this as:

• где делают = where they do

This is a very common Russian pattern: 3rd person plural with no stated subject.

• делают = they do / they make
• but here they does not refer to specific named people
• it means people there, the staff, they in a general sense

So:

• где делают хороший маникюр = where they do good manicures
• natural English: where they do a good manicure / where they give good manicures

Russian often leaves this kind of subject unstated when it is general or obvious:

• Здесь хорошо готовят. = They cook well here. / The food is good here.
• В этом магазине продают свежий хлеб. = They sell fresh bread in this store.

It is in the accusative case because it is the direct object of делают.

The phrase is:

• делают что? = do/make what?
• хороший маникюр

For masculine inanimate nouns like маникюр, the accusative singular looks the same as the nominative singular:

• nominative: хороший маникюр
• accusative: хороший маникюр

So even though the form looks unchanged, grammatically it is accusative here.

Compare with a feminine noun:

• делают хорошую стрижку = they do a good haircut

There the accusative form changes visibly:

• хорошая стрижка → хорошую стрижку

It means and don’t make [you/me/clients] wait a long time.

Break it down:

• не заставляют = they do not force / make
• долго = for a long time
• ждать = to wait

Very literally:

• they don’t make [someone] wait for a long time

In smooth English:

• where they don’t keep you waiting
• where you don’t have to wait long
• where they don’t make clients wait a long time

This is another example of general they:

• the salon staff / the people there

Good question. Russian can leave that object unstated when it is understood from context.

A fuller version might be:

• не заставляют меня долго ждать = don’t make me wait long
• не заставляют клиентов долго ждать = don’t make clients wait long

But in a sentence like this, omitting the object is very natural, because the meaning is obvious:

• the person asking wants a salon where customers are not kept waiting

So не заставляют долго ждать is idiomatic and natural.

English often also does something similar:

• a place where they don’t keep you waiting
• a place where you don’t have to wait long

Because заставлять / заставить is followed by an infinitive to express make someone do something.

Pattern:

• заставлять / заставить + someone + infinitive

Examples:

• Он заставил меня уйти. = He made me leave.
• Нас заставляют работать. = They make us work.
• Не заставляй меня ждать. = Don’t make me wait.

So here:

• не заставляют долго ждать = don’t make [someone] wait long

The infinitive ждать is exactly what Russian normally uses after заставлять.

Because долго is the normal adverb meaning for a long time.

• долго ждать = to wait a long time
• долго говорить = to talk for a long time
• долго ехать = to travel for a long time

длинный means long in the sense of physical length:

• длинная улица = a long street
• длинные волосы = long hair

Its adverb длинно is much less common and usually not what you want for duration.

So for time duration, Russian normally uses:

• долго = for a long time

Yes, it is definitely polite. Several things contribute to that:

1. Если Вам удобно

   • softens the request
   • like If you don’t mind

2. Вам with capital letter

   • respectful written form

3. посоветуйте

   • formal imperative matching Вы

4. The whole phrasing is indirect rather than blunt

   • not just Посоветуйте салон
   • but a fuller, more considerate request

So the tone is something like: If it’s convenient for you, please recommend a salon where they do a good manicure and don’t keep people waiting too long.

Russian word order is flexible, but this sentence is very natural as written.

• Если Вам удобно comes first because it sets the polite tone before the request.
• посоветуйте мне салон gives the main request.
• где делают хороший маникюр и не заставляют долго ждать describes what kind of salon the speaker wants.

A few notes:

• мне can move around somewhat:

  • Посоветуйте мне салон
  • Посоветуйте салон мне

  But the first version is more neutral and natural here.

• The relative clause comes after салон, because it describes the salon:

  • a salon where...

So overall, the order is:

1. polite softener
2. request
3. description of the salon desired

That makes the sentence sound smooth and natural.