Brooklyn's pied pipers Ratatat lure rocker kids into electro and hip-hop territory using crafty trances of delicate melodies and hypnotic power chords. The duo, Evan Mast and Mike Stroud, stays mostly instrumental, but they also have a penchant for remixing rap records; they'll soon release the mixtape Ratatat Remixes Vol. 2 with reconstructions of Notorious B.I.G., Jay-Z, and Ludacris. Ratatat performs with 120 Days and Despot on Friday, March 30, at Bimbo's at 9 p.m. Admission is $16; call 474-0365 or visit www.bimbos365club.com for more info. Tamara Palmer
Santiago Salazar, aka DJ S2 , is a chief operative in Underground Resistance (UR), the Detroit record label revered for its aggressive beats and spiritual melodies. Appearances from the UR roster are infrequent unless you live in Japan; this is the first S.F. gig from one of its members in six years. Bay Area techno producers Jonah Sharp (Spacetime Continuum) and Matt Arnold (Mr. Projectile) will play a live set of unreleased songs without the use of computer software, offering another rare performance on Saturday, March 31, at 536 Stevenson (between Sixth and Seventh sts.) at 10 p.m. Admission is $8-10; call 800-350-3719 or visit www.bassaholicsanonymous.com for more info. T.P.