Blue Ribbon Glee Club, Grun-Tu-Molani, Leaves @ The Empty Bottle

Have you ever wondered how it would feel to hear Fugazi's "Waiting Room" sung a'cappella by 30-some people, with little more than a back beat to keep it going?

The Blue Ribbon Glee Club, a punk-inspired makeshift choir, tackles that and other independent and mainstream rock classics, including selections from Pixies, Dead Kennedys, the Clash, and David Bowie. The result is a rollicking good time.

Melodic, down-tempo jazz/rock quartet Leaves opens this show at the Empty Bottle. Leaves features a pair of regulars in Chicago's avant-garde music community, saxophonist Charles Gorczynski (Silences Sumire) and drummer Charles Rumback, both of whom participate in Colorlist, an ambient assortment of electronic and jazz influences.

Grun-Tu-Molani also performs, mixing slow brass instrumentation with synthesizers, distant guitar effects, and deceptively laid-back beats.