Opens Friday: Savor that eggnog. Spike it, if you wish. And enjoy all the cheer and trimmings of the holidays. It may well be your last holiday season, if the Mayan calendar and Miss Richfield 1981 (Russ King) are to be believed. The Twin Cities entertainer is back with a new theme for her cheeky annual holiday send-up, which has a new title this year: "We'll All Be Dead By Christmas." This will be the 14th year for Miss Richfield at the Illusion. Before the world ends, she's aiming to go out with her own bang. (8 p.m. Fri.-Sat., 7 p.m. Sun., 8 p.m. Thu. Ends Dec. 16. Illusion Theater, 528 Hennepin Av. S., Mpls. $30-$38. 612-339-4944 or illusiontheater.org.)