The buzz about the Pennsylvania blues-rock trio Pearls and Brass has been building all year. Formed in 2002, they were largely unknown outside the Keystone State and stoner-rock circles until they scored a slot opening for ex-Slint guitarist David Pajo in Louisville in 2003. Slint invited them to play the All Tomorrow's Parties festival in London in March and, along with the Fucking Champs (who became Pearls and Brass converts after sharing a bill with them at a recent show in Philadelphia), tipped off Drag City head Dan Koretzky, who signed them last month. Their sole full-length, a self-titled 2003 album on Doppelganger Records, only hints at their incendiary live show, which combines raunchy hard rock and mellower, folk- and country-inflected tunes. They're deeply in thrall to the sound of early-70s groups like the Groundhogs, Cactus, and Sabbath, but instead of just artfully mimicking their heroes, they tap into the skronking, primordial spirit that powered them in the first place. This show is the band's Chicago debut; Pearls and Brass plan to record their Drag City debut later this summer for an early 2006 release. Alton-based riff rockers Camp Climax for Girls, touring in support of their fine 2004 album Ten Dollar Birds (Anomer), open. The Way Back Machine--a crew of Drag City DJs--spins between sets. Mon 6/13, 9:30 PM, Hideout, 1354 W. Wabansia, 773-227-4433, $8.