Mike.
In general
At FKKs you only become committed when you agree to go to the room. However some honour, integrity, and discretion would mean that you shouldn't encourage a girl into kissing and much couch fondling if you aren't going to a room with her. Otherwise the girl may well be very pissed off. (Of course some girls will be pissed off if you just say no the moment she comes up to you). If you encourage several girls to come and join you on a couch and then don't go to a room with any of them you will probably be shunned for the rest of your visit.
If a girl comes up to you and starts checking under your towel to see if you are a likely prospect, then you are not committed (although if you allow her to do this for five minutes then perhaps you might be on dodgy ground, but by that time your brain has probably stopped working).
It is best always to spend a few minutes with a girl before going to a room. You can check out whether you click. Take care if a girl jumps on you and you can't breathe for her attention. Often (not always) this hustle implies that she thinks that a good look at her or a chat might put you off.
The girls always have condoms.
You go back to the locker for cash each time. Sometimes (not often) men carry some money with them to the room in, for example, a book or a glasses case, if for some reason they don't want to go back to the locker
