I really hate the word "swinging", it sounds like something out of the 1970's and makes you think of fat, sweaty people and men with medallions! I like "alternative", "open", "poly" much better.
We've had a few adventures with men, women and couples and would love to meet more entertaining people!
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We also run a swingers website just for fun (absolutely no fees or charges for anything - really!) with 19,000 members now, it's at Fab Swingers - www.fabswingers.com.