I've mainly attended foot parties in Philadelphia, and they're great.
Cool relaxed atmosphere, the girls are friendly (some hotter than others), and it's usually $20 for 10 minute sessions with any woman you want. The women are very open to this, and most really enjoy having their feet tickled, massaged, licked, etc. So if you see a woman you like, just introduce yourself and ask her if she'd like a session. She'll almost always say yes.
There are numerous couches available and there'll be other sessions going on in the same room, but don't feel self conscious. Every other guy in there will be focused on his girl, not you. You can pay extra for a private session, which is normally 30 minutes long.
I forgot to mention at any foot party there's a cover charge at the door. So the night can be a little pricey.
As long as you're polite and courteous with the ladies, you'll be fine.