You go in a public room you expect people to watch but not touch (unless you invite them), you go in a dark room and you can only expect to get touched and more without being asked, that's probably why it's mostly guys in there.
I've only been in a dark room twice, both times with a guy. The first time it was pretty quiet and it was just a bit of bum groping, the second time it was heaving. I ended up on my knees with my f/b's cock in my mouth and two others in each hand, and hands all over me. If anyone went a bit far I grunted and kept my knees closed, they soon got the message.
Just don't go in on your own!