Did someone say transit strike? Stretch them gams, hoist the boombox, and walk it off. SEE The Glorius Mustache Challenge What: Handlebar devotional and hysterical documentary on men who dare to grow them. Mustache-soiree to follow (fake ’staches will be provided at the door). Why: References to Fu Manchu and bravado. When: Tonight, 8 p.m. Where: Crash Mansion, 199 Bowery, b/t Spring & Rivington Sts. R.S.V.P. to email@example.com. Armitage Gone! Dance What: Ballet fused with rapid-fire krumping. Why: Drama on tiptoe. When: Thurs.-Sat., 8 p.m.; Sun., 2 & 7 p.m. Where: The Duke, 229 W. 42nd St., b/t Seventh & Eighth Aves. (212-239-6200). EAT Gilt What: Ambitious gastropalace in former LeCirque space mixes LeClassic with LeModern. Why: It’s year-end bonus time, bigshot. When: Opens tonight. Where: The New York Palace Hotel, 455 Madison Ave., at 50st St. (212-891-8100). DO Marathon Figure Drawing Session What: Models in wild costumes (or none at all) pose and perform while DJs spin and you sketch your heart out. (BYO art supplies.) Why: Unreal studies in realism. When: Thurs., 7 p.m.-4 a.m. Where: Fix Cafe, 110 Bedford St., at N. 11th St., Williamsburg (718-388-8087). Unsilent Night What: Downtown composer conducts caroling procession of boomboxes blaring ambient music. Why: Pump up the volume. When: Sun., 6:45 p.m. Where: The Arch at Washington Square Park, Washington Sq. N, at Fifth Ave. E-mail firstname.lastname@example.org if you can bring a boombox (so they know how many tapes to make). BUY Opening Ceremony and Vivienne Westwood Sample Sales What: Labels like Cloak, Rachel Comey, and Alexandre Herchcovitch are 50-90 percent off at Opening Ceremony; unique cuts from Nine Lives, LeFull, and Vivienne Westwood’s Anglomania. Why: International labels for shopping Olympians. When: OC, Fri. & Sat., 11 a.m.-8 p.m.; Sun., noon-7 p.m.; VW, Thurs.-Sun., noon-8 p.m. Where: OC, 35 Howard St., b/t Broadway & Crosby St. (212-219-2688); Viv, 17 Little West 12th St., 2nd fl., b/t Ninth Ave. & Washington St.