David Lauser a.k.a. Bro and I in 1970. We might have been calling ourselves The Big Bang, Manhole, or Skinny. Bro and I used to set up by ourselves, guitar and drums, in Riverside Fairmount Park.
They had a little amphitheater and we just went and did it without asking for permission. Nothing. There might be 7-10 people who would stop and listen. We didn't give a fuck, we just jammed. Loaded the truck back up at the end of the day.