DJs are competitive buggers, even when there's nothing at stake. But throw in a Rane Battle Mixer as a prize (plus local pride), and the claws really come out. Seattle techno crew Knight-riders hosts this six-jock competition that stresses old-school DJ skills like track selection (strictly from vinyl records), mixing, continuity, crowd response, and stage presence. Kris Moon, Kristina Childs, Same DNA, Jimmy Hoffa, Doughboy, and Trench will cram as many awesome cuts as possible into their 10-minute, mano-a-mano sets. Expect decknical fireworks. (Nectar, 412 N 36th St, 632-2020. 9 pm, $10, 21+.)