Grapple Den is an underground wrestling party, that straddles the line between competitive grappling and kink. Founded by a group of female session wrestlers (skilled female wrestlers, usually with some martial arts training, who charge male clients by the hour for rough play) in 2007 as a way for professional women, clients, and the simply curious to meet, play, and network. There’s no sex, but some participants do get off on the power exchange. The party has changed over the years. While session wrestlers still attend, the crowd comes as much for a social and sporting event as for any kind of kinky thrill.