Umphrey's McGee photo by Chad Smith Chicago six piece Umphrey’s McGee — just named “the most innovative improvising rock group” by Relix magazine — will give fans a preview of their upcoming Wakarusa performance during a two-night run at George’s Majestic Lounge. The group is supporting the September release “Death by Stereo.” The band performs at 8 p.m. today (April 17) and Wednesday (April 18) at George’s. Tickets to either show are $25 and available at the club or through its website.