These could be double-sided such that the inside wall merely separates two side-adjoined bunks, and the structure is something like a box.
Curtains. Perhaps small personal fans in each bunk?
Military barracks. This might be, as best I can tell, a room of 48 beds.
This could be double sided, too.
Parking, lodging, miscellaneous facilities
Conceivably, a family room might have four full-size bunks.
This is a good setup, too. The bottom bunks don't have to be be full-size in order for the steps to be in the middle like that.