MUSIC: Rock veterans Tortoise, who defy categorization, are promoting the release of their first album in five years, Beacons of Ancestorship. Fellow Chicagoans and Thrill Jockey labelmates, Pit er Pat, open.

8 p.m. // Great American Music Hall (859 O'Farrell St) // $25

ART: Spend the evening exploring Dark Art and Dark Poetry, featuring artwork by Daniele Serra, which was inspired by the poetry of Rain Graves, which she will recite live. There will also be "soulful art inspirings" by Kristine Katalyst, and DJ Netik will spin.

7 p.m. to Midnight // Space Gallery (1141 Polk St) // free