Traditional Culture Encyclopedia - Hotel accommodation - What do keys and BAYS in hotel buildings mean?

What do keys and BAYS in hotel buildings mean?

Key is a countable word that can be directly connected with quantitative nouns, such as three keys.

The bay in the building refers to the bay, shelf and span; Window column spacing; Shelf spacing; Floating bridge part

And recesses, niches and wings; Wing, wing; A prominent part of a room, etc.