I used to go to free 'Dead' concerts in Golden Gate park back in the late '60's, what a trip.
In the mid sixties, we used to haunt the Haight, and Golden Gate Park, (including the panhandle), hunting with our cameras.
The whole "hippie" thing was being a'born, and BOY HOWDY!!! there were strange and wondorous weirdnesses a'walkin the streets of the City.
The Dead and other bands were "fightin the Man", ie. Billy Graham, it was free concerts in the park, vs money for entry to Winterland or the Avalon....
Went to my first GD concert in 1970, what a great band.