eady developed in California, particularly in San Francisco, by the mid-1960s, with the first major underground LSD factory established by Owsley Stanley. From 1964, the Merry Pranksters, a loose group that developed around novelist Ken Kesey, sponsored the Acid Tests, a series of events involving the taking of LSD (supplied by Stanley), accompanied by light shows, film projection and discordant, improvised music by the Grateful Dead (financed by Stanley), then known as the Warlocks, known as the psychedelic symphony. The Pranksters helped popularise LSD use, through their road trips across America in a psychedelically decorated converted school bus, which involved distributing the drug and meeting with major figures of the beat movement, and through publications about their activities such as Tom Wolfe's The Electric Kool-Aid Acid Test in 1968. San Francisco had an emerging music scene of folk clubs, coffee houses and independent radio stations that catered to the population of students at nearby Berkeley and the free thins