Let met tell you a story of my people.... well not mine, but my cousin's. She was a fag hag and when we came to visit over the Easter weekend to PETORIA she took me clubbing with the "girls". Now... I was from Bloem and the "girls" stayed in their closet back then so when I found myself surrounded by bumping and grinding men.. not bumping and grinding on me and her... I was totally freaked the hell out, then totally depressed. SIGH. I thought I might as well not have bothered getting my make up and hair done for all the attention I was getting.
And the bathrooms... dear ye gods... You had to go with somebody else to keep the doors closed and EVERYBODY went where they could even though there was separate facilities. You would be doing your lipstick, then notice the person doing hers next to you has chest hair!
In theory if everybody kept things nice and clean and if the stalls were walled up and the doors closed properly and privacy was ensured with proper extraction fans lol you could have anybody in there. But there is a reason girls go in packs. Maybe an attendant stationed in there like they did/do in America would keep things civil?
Also the term "restroom" probably stems from the British "withdrawing room" where ladies went during balls to unlace their corsets, fix their wardrobe malfunctions, gossiped, took off their too small shoes... that kinda thing. It was a place to rest.