The music. The spectacle. The grace. The costumes. Ballroom dance is enjoying a renaissance here in America, as well as abroad, embraced by everyone from grandparents to grad students. Ballroom hoofing has even become a widespread competitive event, dubbed dancesport. But there’s one form of this storytelling-in-motion that is not seen in mainstream venues: same-sex couple dancing. Yet it too is surging in popularity, remaking lives and bodies, along with popular culture and gender politics.