The cast of Broadway’s “HAIR” has canceled its scheduled performance for Oct. 11 in order to voice its support same-sex marriage. The faux-hippies will be bringing their sexual liberation message to Washington, D.C. that day in order to participate in the National Equality March. The Sexist, too, wishes she could play hooky in the name of marriage equality, but she’ll probably be spending Oct. 11hard at work . . . live-blogging about the cast of Broadway’s “HAIR.” Listen, somebody’s gotta keep tabs on the likes of Steel Burkhardt.