7/8/1968: Pink Floyd kicked off their first 20-date North American tour at the Kinetic Playground in Chicago. The club became a driving force in the music business, hosting famous rock acts such as The Doors, The Jimi Hendrix Experience, Led Zeppelin, The Who, The Byrds, Janis Joplin, The Mothers of Invention, The Grateful Dead, MC5, Jethro Tull, Deep Purple, Iron Butterfly, Fleetwood Mac, Vanilla Fudge, Muddy Waters and Jefferson Airplane.