CHICAGO ROOTS COLLECTIVE FESTIVAL
This two-day roundup features local "roots" music bands, a definition that runs the gamut from basic rock 'n' roll to what amounts to electric folk music. The weekend slots more than two dozen bands and singer-songwriters into the Elbo Room, 2871 N. Lincoln, featuring BandCalledCatch, the Shams Band (my pick of the fest -- hot, horn-flecked rock), Goodbyehome, Molehill and Jackpot Donnie leading the bill tonight, and How Far to Austin, Cobalt & the Hired Guns, Todd Kessler & the New Folk, Mike Mangione & the Union and the Future Laureates on Saturday. Music starts at 8 both nights. Tickets, $10 each night or $15 for a weekend pass. Call (773) 549-5549; elboroomchicago.com.

THE POSIES
Power-pop bills are rarely as exciting as Saturday night's featuring the Posies, the band that carried Big Star's banner into the '90s (they just released a new album, "Blood/Candy," their first in five years, with a lighter touch), and Brendan Benson, Jack White's foil in the Raconteurs but boasting a nearly flawless solo catalog. Opening is Aqueduct, the slamming keys and sharp melodies of Dave Terry. That's a lot of awesome under one roof. At 8 p.m. at the Bottom Lounge, 1375 N. Lake. Tickets, $20. Call (312) 666-6775; bottomlounge.com.

JUNIP
Jose Gonzalez keeps coming back in different guises. First, we heard his somnambulent purr as a vocalist on a few Zero 7 tracks. Then, he toured and recorded his own songs. Now, he's back leading his '90s band, Junip, which gives his nasal drone a bit of heft. Sharon Van Etten opens at 10 p.m. Saturday at Lincoln Hall, 2424 N. Lincoln. Tickets, $15. Call (773) 525-2501; lincolnhallchicago.com.