Auditions for Who Killed Santa Claus? take place from 11 a.m. to 2 p.m., Saturday, Sept. 15. Performances are at 11 a.m. and 6:30 p.m., Sunday, Nov. 11. Rehearsals are 4:30 to 6:30 p.m., Monday through Wednesday, beginning Monday, Oct. 1. Paid parts are available for three men and two women; most require singing; all require experience in adult improv. Call (310) 367-5640 for more information. Do not call the hotel.