I have been to fetish affairs before, and your experience will vary depending on who you are, how you dress, and your appearance.
I am a handsome guy, average height, and muscular. The first time I went to f.a. I did not know what to expect. The girls will look at you from head to toe to "read you." I was a bit shy, and I sat on the couch. But, there was one girl who approached me and asked what I was into. I told her I am just browsing. I also had 2 girls hold my hand, and said they offer oral, " if it is the right guy, and right money." I declined.
I saw some dudes wearing basketball shorts, and sports shirts. I knew they were not going to get anything. It was obvious they were broke.
At the end, I ended hanging out with the girl that first approached me. She was really cool, I just got a lap dance from her for $20. We did hold hands and kissed. She did offer oral, but I declined. I now wish I would have gotten her number.
Overall, you experience will vary, and make sure you tell a girl what you want, and the price. F.A. was cool, and you don't have to go with any girl that may approach you.