“Lend Me a Tenor,” Blue Slipper Theatre, 113 E. Callender St., Livingston, 8 p.m., $15, $12 for students and seniors at the door with cash or check, blueslipper.com. Call (406) 222-7720 for reservations or purchase tickets at blueslipper.brownpapertickets.com. The general manager of the Cleveland Grand Opera Company is primed to welcome world famous Tito Morelli, the greatest tenor of his generation, to appear for one night only as Otello. The star arrives late and, through a hilarious series of mishaps, is given a double dose of tranquilizers and passes out. This screwball comedy is for mature audiences.