 To join Gotham Girls, skaters must complete tryouts that occur annually in October before they become the league's newest inducted skaters.Skaters tryout over a weekend then advance to tryout period lasting several weeks before they become official league members.Karin "Chassis Crass" Bruce and David “Lefty” Leibowitz met through an online ad in 2003 and together formed Gotham Girls Roller Derby (GGRD), initially recruiting skaters and holding “open skate” sessions.