Sounds familiar; my parents kept me from attending the May 1969 concert on a Thursday night because my boyfriend had kept me out until late the night before. Friday morning I was back in school in my art class and several of my classmates were talking about the night before. They had scheduled two performances in one night, and the first audience refused to leave, so they called the police. The next morning the stage was a mess, which interfered with the dance classes that were usually scheduled there.