You get a towel on arrival, wearing it is optional, some walk around naked, others with it around you, it depends on how comfortable you feel.
As for suggestions, it depends what you are looking for, on the top floor is a cinema room where you can watch porn, next to it are darker rooms where you will find most guys go for fun.
My advice, enjoy it and don’t hold back, if someone is not interested they will soon tell you, just as you can do to others.
Have fun xx