Cosmic TripA trip through Minneapolis rock concert history framed through psychedelic poster art In the years 19691970 the Minneapolis Labor Temple burned brightly as the center of the Twin Cities music scene. The Labor Temple was transformed into a rock club with a 1,200 person capacity and hosted famous acts such as the Grateful Dead, Spirit, Ten Years After, Muddy Waters, and the Byrds. This included several local bands like the Litter and Jokers Wild that