communal shower

noun2

1. •
   A place where multiple showers are in the same room, for multiple people to use at the same time, wherein there may or may not be a partition between the showers.

   • The new fitness center has communal showers in the locker rooms.
2. •
   An instance of using such a place to take a shower.

   • The basketball team took a communal shower after the game.