Cubicle

Noun

 * 1) A small separate part or one of the compartments of a room.
 * Most libraries provide cubicles for quiet study.
 * 1) A small enclosure at a swimming pool etc used to provide personal privacy when changing.
 * 2) A small enclosure in a public toilet for individual use.

Thesaurus
alcove, bay, bedchamber, bedroom, boudoir, carrel, chamber, corner, cove, cranny, cubby, cubbyhole, cubiculum, dormitory, niche, nook, nursery, oriel, recess, roomlet, sleeping room, snuggery