I don't know what it is. There's just something envigorating about performing with a bunch of chickens. Here I find myself backstage at Ziff Ballet Opera House on the rehearsal stage. The chickens and the Slash Chorus, LGCSF, the Lesbian/Gay Chorus of San Francisco, are running through some moves before going onstage before a house of 2,454 seats. From the stage, Artistic Director Stephanie Lynne Smith offers the costumes to any takers after the show. Before they even get to the lobby they are all taken. Except one, which the Chorus will keep for their records, as a maquette, in case they revive June Bonacich's musical Group Therapy.