Wattstax (Mel Stuart, 1973)

Mel Stuart's Wattstax, a document of the concert that gives the film its name, is not strictly a concert movie. Instead, it often moves from the concert to the neighborhood around it, touching on racial pride and tension the place that exploded these issues outside the Deep South. The music becomes simultaneous escape from and voice of the pain and anger on display, culminating in a performance from Isaac Hayes that focuses everything into one delightfully tacky gold chain vest.