A documentary film about the Detroit-based music magazine Creem, Boy Howdy!: The Story of Creem Magazine chronicles the magazine's history and charts its rise from an underground paper to a commercial success that gave the late, great music writer Lester Bangs an outlet for his writing. It screens tonight at 7 at the Rock Hall. Tickets are free for members, or $5.50 for non-members. (Niesel)