It's becoming a holiday tradition as predictable as stuffing stockings or popping champagne: The Murder City Devils are playing a reunion show! Perennial or not, any chance to see the on-again, off-again MCD is a cause for celebration. Spencer Moody still breathes high-proof fire, the band still tears up punk rock with booming swagger and more swing than a gallows, and their devoted crowds still go appropriately apeshit in the pit. It may be fewer than 364 days till the next time, but you'd do well not to miss this show. (Showbox at the Market, 1426 First Ave, 628-3151. 8 pm, $20, all ages.)