Founded just down the road in Buffalo in 1989, moe. sits at the top of the jam-band heap. But truly moe. is more improvisational than jam. Jam bands often don't know when to stop, whereas improvisational bands do — they just don't care. Moe. keeps it free and easy within its complexity, with feet on the ground and hands in the air. Rochester fave Audio Influx also performs.

Moe plays Party in the Park Thursday, June 20, 5-10 p.m. at the Riverside Festival, corner of Court Street and Exchange Boulevard. $2-$5. cityofrochester.gov/PIP.