I have been to swing clubs and house parties in the past. I am assuming you mean something like this as opposed to a whore house/massage parlor which I have never visited.

You can sometimes find someone reasonably hot to fuck. Most of the time it is older couples where the woman identifies as BBW and has a fetish of being fucked by a lot of guys while the hubby watches. If are relatively cool and mellow, you have a pretty good chance of getting laid if you are a guy.

I usually like the couples events as it is more like an orgy than a JM gangbang/bukkake. I got to bang a very cute Persian woman while her husband fucked the woman I brought with me at a few of the house parties I went to.

In Los Angeles there is a very high end swingers group that spends a lot of money to rent out a floor from high-end hotels to party. They cater to very rich/celebrity types.