MUSIC: Consider the Source ("Middle Eastern funk) and Blue Rabbit ("lyric-driven art rock" that features Celtic harp strumming) perform tonightin SoMa.

8 p.m. // Climate Theater (285 9th Street) // sliding-scale donation

READING: Come hear Joe Nick Patoski read from his latest bio, Willie Nelson: An Epic Life, about everyone's favorite crooning "Texas hippie icon ."

7 p.m. // Booksmith (1644 Haight) // free