The once imperiled dance space at 280 Broadway, recently revived by Gina Gibney, begins its inaugural series, DoublePlus. Each weekend through mid-December, a different choreographer-curator selects two artists to share an evening. First up, chosen by Annie-B Parson, are Ms. Hailes, a theater artist based in the Bronx, and the men of Royal Osiris Karaoke Ensemble (Tei Blow and Sean McElroy), who describe their collaboration as "a musical priesthood that explores the metaphysics and mythologies of love, desire, and courtship in the age of the Internet."