From Wikipedia

Summer Of Love

The Summer of Love refers to the summer of 1967, when as many as 100,000 people converged on the Haight-Ashbury neighborhood of San Francisco, creating a phenomenon of cultural and political rebellion. While hippies also gathered in New York, Los Angeles, Atlanta, Philadelphia, Seattle, Portland, Washington, D.C., Chicago, Montreal, Toronto, Vancouver, and across Europe, San Francisco was the center of the hippie revolution, a melting pot of music, psychoactive drugs, sexual freedom, creative expression, and politics. The Summer of Love became a defining moment of the 1960s, as the hippie counterculture movement came into public awareness. This unprecedented gathering of young people is often considered to have been a social experiment, because of alternative lifestyles that became common, both during the summer itself and during subsequent years. These lifestyles included communal living; the free and communal sharing of resources, often among total strangers; and free love.