The Organza G Trio plays such greats as “Mister Magic” by Grover Washington, “It’s Too Late” by Carol King, and Marvin Gaye’s “What’s Going On.” Band leader Greg “Super G” McKinney is retired from the University of Michigan Health System, where he worked in the main operating rooms. Now music has taken center stage for him on keyboard and vocals. He is joined by Charles Prophit on saxophone and Joe Gagaleio on percussion.