Moby Grape, Mid 60's (or so), Central Park (NY). Schaefer Beer used to run concerts in the summer. $2 to get in, free if you wanted to sit on the lawn and listen (but not see). This is the first concert that I saw. I saw or listened to a lot of music at that venue. The best was The Band in the early 70s.
Yes, a beer company sponsering concerts for young people. Times have changed.