Take him to a swing club, swing party or femdom party, but don’t let him accompany you as you walk around anywhere else than the bar…..Just leave him at bar waiting for you while you go off and explore.
Alternatively, you can tell him you are going to a swingers party with a couple you met at a femdom party, but that he is not invited. Let him know a couple days in advance about how curious and excited you are, and make sure you get dressed with very sexy lingerie while he sees you. Then leave him at home with a bunch of chores while he waits for you!
Make sure in either case to have your ankle bracelet on when you go out!