Shower with very low ceiling, okay?
The Code requires a height of 6’-4” from the standing surface of the shower to the ceiling of the shower. (See ICC R305.1, exception #1.) Also, the shower shall be a minimum of 24” x 30” and have a non-previous surface up 6’ from shower floor surface.

Minimum room heights are 7’-0”, unless the ceiling slopes, then it’s complicated, except bathrooms shall have a minimum ceiling height of 6’-8”, unless it slopes. (See ICC R305.1.)