I watched a movie on Showtime at the hotel called "Palm Swings" starring Sugar Lyn Beard. Provided it's accurate, swingers often have parties at motels where you figure out who you are going to bang, then you go to their motel room to make it happen while your wife goes to another room to take care of her business. It's not a group sex thing.I thought swinging involved participating together that just sounds like mutual adultery.
Oh, and according to the movie, your wife then realizes that new guy is better than you and runs off with him while the girl you banged is no longer interested in you, leaving you alone, depressed, and questioning your manhood.
Good luck Wynn!