Saturday Happenings

Collective Action

Jamaica Plain's Whitehaus Collective hoofs it across the river for Weirdstock, "three days of experimental music and art." Featuring everything from new music compositions for toy piano to "samplerdelica" and "the self-proclaimed doctor of organomics."
Tonight's showcase features bands with dirty names like The Hard Nips and Dick Heaven. Cambridge YMCA Theatre, 820 Mass. Ave., Cambridge, noon to midnight (through Sunday). Ticket prices and more information.

Roller Derby

It's the Boston Derby Dames' seventh and final team bout of the season, and the Boston Massacre looks to settle the score with the Detroit Derby Girls, who won the previous bout in a close overtime jam. Also on the card: the Cosmonaughties against the Wicked Pissahs. Aleppo Shriners Auditorium, 99 Fordham Rd., Wilmington, 4 p.m. $14/$16.

Anime

Bostonist's anime pass was revoked years ago, so we have no idea what this Evangelion 1.0 (2007) is, or if it's any good, but we owe it to our nerds to mention that it's screening today. Brattle Theatre, 40 Brattle St., Cambridge. More information.