In the wake of the death of Grateful Dead co-founder and guitarist Bob Weir, his Dead & Company bandmate John Mayer looked to listen to Grateful Dead music to find some comfort. So, to bring the community together, the singer-guitarist is launching a Grateful Dead Listening Party. “In the days after we lost Bobby Weir, I tried listening to Grateful Dead music as a way to be soothed. “After talking with friends who felt the same, I knew I wanted to start Grateful Dead Listening Party,” Mayer added. Recalling playing next to Weir, Mayer said, “It changed over the years, because we both got to know each other and trust each other.