There is a
group in the Bay Area that used to run things that were a lot like Swing Parties
(i.e. there would be sex on premises)-and folks were STD screened to attend. I'm not sure if they still do this, but the group still exists.
Now, this is NOT a swing club in the sense some one can just plunk their money down and attend a party-their screening process(and fees) are more than many swing clubs-and they sell a lot of seminar/classes(where most of their money is made).