As someone who's worked in restaurants what I recognize about this bathroom is all the beautiful tile. What that means is that somewhere in the house, there is a hose that spits boiling hot water. With this hose you can clean and sanitize a bathroom stall without ever having to step inside of it.

The first restaurant I ever worked in was a fast food joint and they cleaned the whole dining room this way. They had that water heater turned up to fuck-you and it was a little scary.