This was a comic (?) telling of the coming together of the music festival that ever since has served as shorthand for the 60's, itself shorthand for the rejection of the rottenness and conformity of the overweening corporate culture.
The humor was too broadly played for my taste and even though it was based on a true story I thought they schlocked it up beyond the point of my limited tolerance for this kind of drivel. Too bad. The audience I saw it with seemed to respond, like sheep, to the programmed cues.
Every theme here has been done better. See A Walk on the Moon, for example.