Self-described “cave pop” trio Box Elders, featuring Jeremiah McEntyre of the Afflictions and Dave Goldberg of the Terminals, plays a free set at Permanent Records (1914 W. Chicago) Saturday at 5 PM. The Omaha-based group specializes in meticulously recorded proto-punk compared to pre-VU Lou Reed. Call 773-278-1744 or click here for more info.