Saturday Happenings

Roller Derby

The Boston Derby Dames welcome Austin's Texacutioners from the inhuman heat of their home state in order to put the beat down on them properly. Not only do Boston and Austin rhyme, both cities have provided the location for notorious shoot-outs. They had Charles Whitman to deal with; we had the entire freaking British army. We think we know who has the upper hand in this bout. The first bout pits the Cosmonaughties against the Nutcrackers. Shriner's Auditorium, 99 Fordham Rd., Wilmington (please carpool), 5 p.m. $14/$16.

Beer

The American Craft Beer Fest continues with two sessions today. Admission includes a tasting glass and "access to over 300 craft beers!" Seaport Hotel, World Trade Center, 200 Seaport Blvd., 1 p.m. and 6 p.m. $40.

Movies

Otto Preminger's Anatomy of a Murder (1959) is a notoriously fussy film with cinematography that's so kinetic, you can get a neck cramp trying to follow it. It's also the first post-code Hollywood film to deal explicitly with rape. Stand out performances by Ben Gazzara, Lee Remick, and, of course, James Stewart. Remis Auditorium, Museum of Fine Arts, 12:40 p.m. $10/$8.

Weird Music

Opensound brings experimental improvisation to Somerville tonight with performances of electro-acoustic ensemble The BSC and of John Cage's Cartridge Music. Third Life Studio, 33 Union Square, Somerville, 7:30 p.m. $7 suggested donation.

Jazz

Baritone saxophone player and NEC alumna Kathy Olson brings her post-bop ensemble to Central Square tonight for an evening of Boston jazz. Cafe Luna, 403 Mass. Ave., Cambridge, 10 p.m.

New Music

The SICPP Iditarod is the exclamation point at the end of NEC's Summer Institute for Contemporary Performance Practice: 6 straight hours of new music. Today's performance features work by Jonathan Harvey, Frederic Rzewski, Morton Feldman, Lee Hyla, Karlheinz Stockhausen, John Cage, Michael Finnissy, Toshio Hosokawa, Steve Reich, and the Composition Fellows of SICPP 2009. (Hopefully at least one of them was a woman.) Brown Hall, New England Conservatory, 30 Gainsborough St., 4 p.m. Free.