Общая кухня находится рядом с кофейной зоной.

Because кухня is a feminine singular noun, and the adjective has to agree with it in gender, number, and case.

• кухня = feminine
• nominative singular feminine adjective ending here = -ая
• so: общая кухня

Compare:

• общий офис = a shared office
• общая кухня = a shared kitchen
• общее помещение = a shared room/space

Because the phrase рядом с requires the instrumental case.

So:

• dictionary form: зона
• instrumental singular: зоной

That is why the sentence says:

• рядом с зоной = next to the zone/area

In this sentence, the adjective also changes to instrumental:

• кофейная зона → с кофейной зоной

For the same reason: it has to agree with зоной, which is in the instrumental case.

The noun phrase changes together:

• nominative: кофейная зона
• instrumental: кофейной зоной

So both words change:

• кофейная → кофейной
• зона → зоной

This is normal adjective-noun agreement in Russian.

Рядом с means next to, beside, or near.

It is a fixed expression:

• рядом с офисом = next to the office
• рядом с лифтом = next to the elevator
• рядом с кофейной зоной = next to the coffee area

A useful thing to remember is:

• рядом = nearby / close
• с in this expression is part of the construction, and it takes the instrumental case

So you should learn рядом с as a whole phrase.

Because prepositions in Russian often have different meanings depending on the expression.

By itself, с often means with:

• с другом = with a friend

But in the fixed phrase рядом с, it does not mean ordinary with. The whole expression means:

• рядом с = next to / beside

So it is better not to translate с word-for-word here. Think of рядом с as one unit.

Находится means is located, is situated, or simply is in a location.

It comes from the verb находиться.

In this sentence:

• Общая кухня находится рядом с кофейной зоной.
• literally: The shared kitchen is located next to the coffee area.

This is a very common way to describe location in formal or neutral Russian.

Because the subject is singular:

• кухня = one kitchen

So the verb must also be singular:

• кухня находится

If the subject were plural, you would use находятся:

• Кухни находятся рядом с офисом.
• The kitchens are located next to the office.

Yes, often you can, especially in everyday speech:

• Общая кухня рядом с кофейной зоной.

This is natural and common in informal Russian, especially in signs, directions, or simple descriptions.

However:

• находится sounds a bit more complete, neutral, or formal
• leaving it out sounds more conversational or compressed

So both can work, depending on context.

Yes, общая кухня is a natural way to say shared kitchen / common kitchen.

общий / общая / общее often means:

• common
• shared
• communal

So общая кухня means a kitchen used by multiple people, not someone’s private kitchen.

Depending on context, Russian might also use other wording, but общая кухня is perfectly standard.

Yes. Russian word order is fairly flexible, though some versions sound more natural in certain contexts.

Neutral word order:

• Общая кухня находится рядом с кофейной зоной.

You could also say:

• Рядом с кофейной зоной находится общая кухня.

This version puts more focus on the location first, almost like:

• Next to the coffee area is the shared kitchen.

Both are correct. The difference is mostly in emphasis and style, not basic meaning.

Кухня is in the nominative case, because it is the subject of the sentence.

You can tell because it is the thing that is located somewhere:

• Общая кухня = the shared kitchen
• находится = is located

So:

• subject = общая кухня
• predicate/verb = находится
• location phrase = рядом с кофейной зоной

This is one of the common feminine singular instrumental endings.

For many feminine nouns ending in -а, the instrumental singular ends in -ой or -ей:

• зона → зоной
• комната → комнатой
• машина → машиной

Likewise, feminine adjectives in the instrumental singular often end in -ой / -ей:

• кофейная → кофейной
• большая → большой

So кофейной зоной is a normal instrumental feminine singular phrase.

Yes, it is understandable and natural, especially in modern office, hotel, or coworking contexts.

It means a coffee area, coffee corner, or space for coffee.

You may also see similar expressions like:

• зона отдыха = relaxation area
• рабочая зона = work area
• обеденная зона = dining area

So кофейная зона fits that same pattern.