What is the collective noun of a set rooms?

There isn't a single, widely accepted collective noun for a set of rooms. However, depending on the context, you can use different terms:

General:

* Suite: This is the most common term, often used for a set of connected rooms, like a hotel suite or a living suite in a house.

* Apartments: Used for a set of rooms within a larger building, designed for living.

* Chambers: A more formal term, often used for rooms in a building like a castle or a monastery.

Specific:

* A wing: Used to describe a group of rooms located together in a building.

* A floor: Used to describe a level of a building containing several rooms.

Figurative:

* A labyrinth: Used when the rooms are complex and confusing.

* A maze: Similar to a labyrinth, implying a sense of being lost or disoriented.

Ultimately, the best collective noun for a set of rooms depends on the specific situation and what you want to emphasize.