For one night only, Erik Davis—author of Techgnosis: Myth, Magic, and Mysticism in the Age of Information and the 33 1/3 book on Led Zeppelin IV—presents a clip-heavy performance lecture on Aleister Crowley, the 20th-century magician and occultist whose development and influence Davis will trace via rare footage, experimental shorts, and documentary clips, “with special attention given to the work of Kenneth Anger and the rise of magic in the 1960s and ’70s.” (Northwest Film Forum, 1515 12th Ave, 829-7863. 9 pm, $9.)