In 1970 I was hitchhiking into Washington, D.C. from the Maryland suburbs on a Saturday night with a friend and we were picked up by a van full fellow longhairs who were heading to American U.'s athletic field to see a free concert by a group we had just recently become aware of called the Grateful Dead. What we encountered when we got there was a giant, swirling dance party on the grass that must have gone on for about four hours. That night was a real eyeopener to say the least.vl