This Thursday’s Improvised Music Series feature two special collaborations in the style of the uniquely Chicago blend of free jazz and rock and songwriting styles: Three Grebes (Kalamazoo/Chicago) and Floating Cave join forces to create a mixture of improvised songs and drones, expanding a singular guitar and tuba-driven rock sound with exploratory electronics. Before them, a quartet assembled by saxophonist Gabriel Heinemann combines up-and-coming forces in Chicago jazz with some of its’ most stalwart legends. Music starts at 8:30–Not to be missed!