Music From Mars: NRG Ensemble; The Hungry Brain, Chicago, 9pm.

Musicians who worked with Mars Williams in the NRG Ensemble, founded by Hal Russell, will perform two sets of compositions Mars wrote for the band. The lineup includes Steve Hunt (drums), Kent Kessler (bass), Fred Lonberg-Holm (cello), Dave Rempis (saxophones), Brian Sandstrom (multiple instruments), and Ken Vandermark (reeds).