Gary & Margaret's is a private swingers party house in Mira Loma, Jurupa Valley, California, and the hosts say they are now in their 30th year. Parties run on Saturday nights from 8pm to 2am, with a second, daytime party on Sundays. The draw is the garden: a pool and spa for nude swimming, a zen garden with a koi pond, and a submarine-themed playroom. Couples, single women and a limited number of single men attend, and phone reservations are required for every party.