In the title of this new biography of guitar god Eric Clapton, 12 Bars refers to a standard blues structure, the 12-bar blues. But Clapton also, throughout his history, had times when he was much less then sober, and visited many more than 12 bars in his day. This film tells his story, which at times is triumphant, and at other times tragic and traumatic. But always, regardless, there’s the music. For a full review, see David Hinckley's All Along the Watchtower.