Can't really add any more than what has been said here, very good posts especially Marmalade and Dani's. As a numbers of members have already told the OP, taking a prossie to a swinger's club is a huge no-no.
Not only will you be spotted a mile off but people will avoid you like the plague. So many people, especially young men, think swinging is a place where you can get easy/free sex and it's not that.
When my lover and I used to go swinging we spotted so many guys with prossies. I remember this particular man, middle aged, who arrived with this beautiful 20-odd year old woman. It was funny seeing the guy leaving the prossie sitting pretty holding a drink; off he went trying to get a few fucks as quickly as possible on his own (the prossie was on the clock you see). As everyone sussed the guy out he didn't even get to sniff a pussy. Whilst he was jumping from room to room lots of guys were trying to chat the girl up but she refused any kind of interaction. It was quite sad actually seeing the two in there. They left very soon after. I wonder how much that cost the guy.
As I said before, swinging is a lifestyle. You really have to immerse yourself into it. Join their forums, attend munches, get yourself known, there are a lot of time wasters so if you are known as a reliable guy the word spreads, you get invited to parties and then the fun starts. All that takes time and effort. Oh and of course not all swingers are pretty 20 years olds. They are of all ages and sizes.