Давай хотя бы спокойно поужинаем вместе.

Here давай is used to make a suggestion, like let's in English.

So:

• Давай поужинаем = Let’s have dinner
• Давай хотя бы спокойно поужинаем вместе = Let’s at least have dinner together peacefully

Literally, давай comes from the verb давать (to give), but in everyday Russian it very often works as a conversational particle meaning come on / let’s.

With one person, давай is informal.
With more than one person, or in polite speech, Russian often uses давайте.

Поужинаем is the perfective form of the verb, while ужинаем is imperfective.

• ужинать = to be having dinner / to have dinner in general
• поужинать = to have dinner as a completed event

After давай, Russian very often uses a form like поужинаем to suggest doing one complete action:

• Давай поужинаем = Let’s have dinner
• Давай ужинать = Let’s eat / let’s start having dinner

So поужинаем sounds like let’s sit down and have dinner, viewed as one whole event.

Because Russian normally leaves out subject pronouns when they are already clear from the verb ending.

The ending -ем in поужинаем tells you it is first person plural:

• я = I
• мы = we

So поужинаем means we will have dinner or, in this kind of sentence with давай, let’s have dinner.

Russian does not need мы here, just as English does not say we let us have dinner.

Хотя бы means at least.

It often suggests:

• this may not be ideal, but it is the minimum acceptable thing
• if nothing else, let’s do this one thing
• there may have been conflict, disappointment, or other plans that failed

In this sentence, хотя бы gives a feeling like:

• if nothing else, let’s at least have dinner together peacefully
• can we at least manage this much?

So it adds emotional nuance, not just factual meaning.

Not exactly. Спокойно can mean calmly, peacefully, without stress, without arguing, or in peace, depending on context.

In this sentence, it most likely means something like:

• peacefully
• calmly
• without drama / without fighting

So the idea is probably not about physical silence, but about emotional calm.

If someone wanted to stress literal silence, they might choose other wording depending on context. Here спокойно feels more like let’s just have a calm dinner together.

Вместе means together.

It is an adverb, not an adjective, and it tells us how the dinner happens:

• поужинаем вместе = have dinner together

It does not change form here. There is no case ending to worry about.

Russian word order is fairly flexible, and changing it often changes emphasis, not the basic meaning.

The original sentence:

• Давай хотя бы спокойно поужинаем вместе.

Possible variations:

• Давай хотя бы поужинаем вместе спокойно.
• Давай спокойно хотя бы поужинаем вместе.
• Хотя бы давай спокойно поужинаем вместе.

These all sound slightly different in emphasis. For example:

• putting хотя бы earlier highlights the at least
• putting спокойно earlier highlights the wish for calmness
• putting вместе earlier highlights togetherness

The original order sounds natural and balanced.

You can say давай ужинать, but it feels a bit different.

Compare:

• Давай поужинаем = Let’s have dinner
  Focus: the dinner as a whole event

• Давай ужинать = Let’s eat / let’s start having dinner
  Focus: the process or beginning of the activity

In this sentence, поужинаем sounds more natural because the speaker seems to be proposing one complete shared event: let’s at least sit down and have dinner together peacefully.

Yes. Давай is informal.

You would use it with:

• friends
• family
• a partner
• children
• someone you know well

For polite or plural speech, Russian usually uses давайте:

• Давайте хотя бы спокойно поужинаем вместе.

That could mean:

• Let’s at least have dinner together peacefully
  to several people, or
• the same idea said politely to one person

Yes, grammatically поужинаем is a first person plural future form of a perfective verb, so by itself it can mean we will have dinner.

But when it is used with давай, the combination functions as a suggestion:

• Давай поужинаем = Let’s have dinner

This is very common in Russian. So the literal grammar and the conversational function are not exactly the same thing.

It sounds like the speaker is trying to calm a situation down.

Because of хотя бы and спокойно, the sentence may suggest:

• there has been tension
• something went wrong
• the speaker wants to stop arguing
• the speaker is asking for one simple, peaceful moment together

So it can feel like:

• a plea
• a compromise
• a gentle attempt to restore peace

That emotional nuance is an important part of how the sentence feels in real conversation.

Sometimes, yes, but it would sound different.

• Хотя бы спокойно поужинаем вместе.

This can work in conversation, especially with intonation, but it is less explicitly a let’s-suggestion and can sound more abrupt, more literary, or more dependent on context.

Adding давай makes the invitation/suggestion much clearer and more natural in everyday speech:

• Давай хотя бы спокойно поужинаем вместе.

They are similar, and both can mean at least, but they are not always interchangeable in tone.

• хотя бы often sounds more emotional, conversational, or like if nothing else
• по крайней мере often sounds more neutral, logical, or formal

In this sentence, хотя бы is the more natural choice because the sentence feels emotional and spoken, not formal or analytical.