Saturday Happenings

Big Fat Slideshows

Two of Bostonist's favorite cartoonists, locals Brian McFadden of the foul-mouthed strip Big Fat Whale and Keith Knight of the relatively more wry K Chronicles, join forces to get you drunk and make you buy stuff. It's a "Comix Slideshow and Beer Summit" commemorating the release of McFadden's new book, Fun Stuff for Dum-Dums. The Burren, 247 Elm St., Somerville, 4 p.m. to 7 p.m. Free. More information.

Rock Gimmicks

One Night Band is a rock and roll lottery in which members of a clutch of Boston's rock bands are shuffled together into new bands, which have to perform four or five songs. It's a one-night-only kind of thing and it will probably suck and rule in equal measure. Middle East Downstairs, 472 Mass. Ave., Cambridge, 8 p.m. $12. More information.

Movie Gimmicks

The 80s Sing-a-Long Prom is the exclamation point at the end of the Brattle's 1984 retrospective series. It's a video mixtape of 80s prom classics, with a heavy dose of John Hughes soundtrack music, including subtitles to enhance sing-a-long accuracy. Prom attire encouraged. Brattle Theatre, 40 Brattle St., Cambridge, 10 p.m. $12/$10. More information.

Midnight Movies

The Room (2003) is reportedly "the Citizen Kane of bad movies." It's the latest addition to the American canon of midnight movies, and the Coolidge gives it the proper B list treatment tonight. Coolidge Corner Theatre, 290 Harvard St., Brookline, 11:55 p.m. $7.