It's a primetime show on CBS on Thursday nights. It's kind of like Desperate Housewives except that some of the couples in the neighborhood are swingers. They are trying to convert some of the other neighbors into swinging.
Swinging is fast becoming more common like it was in the 70s. People now know how to protect themselves from STDs better than they did 10yrs ago so now the lifestyle is slowly coming back into vogue.