Communal showers are a group of single showers put together in one room/area. They are often used in changeroom

Changeroom

A changing room, locker room, dressing room or changeroom is a room or area designated for changing one's clothes...

s, prisons, and army barracks for personal hygiene.

Though not as widely used in the West today, communal showers are often present in school locker rooms for use in personal hygiene after physical education

Physical education

Physical education or gymnastics is a course taken during primary and secondary education that encourages psychomotor learning in a play or movement exploration setting....

. They also continue to exist in some gym

Gym

The word γυμνάσιον was used in Ancient Greece, that mean a locality for both physical and intellectual education of young men...

nasia and many swimming pools.