We've written about both bands and featured their music on Concord Patch before - if you're wondering why, check out their sound.
Both Stomacher and The Chaw have roots in Concord - here's your chance to see what the local talent pool has to offer:
Follow the links to read Patch stories on each band and to hear their music.
The Chaw - Free show.
Saturday, March 31 at Shattuck Down Low.
8 p.m. at 2284 Shattuck Avenue, in Berkeley.
Played tunes from the band's new album, Thursday, March 29 at Slim's.
7:30 p.m. at 333 11th Street, in San Francisco.
Like what you hear? Tell us in the comments.