Grateful Dead framed autographed "Avalon Ballroom: Grateful Dead / Oxford Circle Tour" collage. With the 1960s came the psychedelic movement, a time when taking hallucinogenic drugs and listening to experimental music peaked within the countercultures of America and Great Britain. Among the movement's most famous musicians were the Grateful Dead, which mixed genres such as psychadelia, blues, folk, country, rock 'n' roll and jazz to create their incredibly unique rock sound. Known for changing set lists for each show, and for sometimes playing for more than four hours in one set, the Dead created songs like "Sugar Magnolia," "Casey Jones" and "Scarlet Begonias." While the group toured with various musicians until it disbanded in the late 1990s, its main members included Jerry Garcia, Bob Weir, Phil Lesh and Mickey Hart. Poster autographed by Jerry Garcia, Bob Weir, Ron "Pigpen" McKernan, Phil Lesh, Bill Kreutzmann, Mickey Hart.