A shower show is a special erotic dance that is performed in a glass-enclosed shower stall for paying customers. Some clubs have shower shows on the main floor either above or in close proximity to the main stage. Some clubs also offer private shows.
A shower show plays to the fantasy of watching a woman in the shower.
More About Shower Show
Most of the time, a shower show involves two girls and they don't dance so much as "wash" each other and press their breasts and bottoms against the glass.
These showers usually have a removable shower head so the dancers don't have to ruin their hair.