This low-budget biopic of Chicago record men Phil and Leonard Chess—whose legendary label broke such artists as Chuck Berry, Bo Diddley, Willie Dixon, Muddy Waters, and Howlin’ Wolf—has been sitting on the shelf since 2008, when it was muscled out of the marketplace by Cadillac Records, Sony’s glossy, star-studded movie about Leonard. But it’s clearly the better movie, earthier, wittier, and more intimate in its treatment of America’s racial divide in the 1950s. The central story follows the Chess brothers (Jon Abrahams and Allesandro Nivola) as they segue from the salvage business to the record business and, advised by Dixon (an excellent Chi McBride), discover Waters (David Oyelowo, sly and sexy) and later take a gamble on rock ‘n’ roll, sensing its wider appeal. Jerry Zaks (Marvin’s Room) directed. 92 min.