MUSIC: Tonight's installment of the monthly Communion club, which originated in the U.K. and was founded by Mumford & Sons' Ben Lovett, features a stellar line-up, including The Entrance Band, Tim Cohen, Hot Lunch, Matt Baldwin, and Ready Steady. (7:30 p.m., Cafe Du Nord, 2170 Market)

FILM: The San Francisco Film Society presents Green Scene, a class that surveys green-themed documentaries, reassessing our perspective on the world from the ground up. "Learn about this increasingly expansive genre and get introduced to the green dialogue taking place on screens big and small all over the world." (7 p.m. Roxie Theater, 3117 16th Street)

COMEDY: Get the best in queer and queer-friendly comedy at the monthly Qcomedy Showcase. Tonight's line-up includes Morgan, Pippi Lovestocking, Paul Pratt and Charlie Ballard, with host, Nick Leonard, and the legendary Joe Wicht on the piano bar. (8 p.m., Martuni's, 4 Valencia Street)