Have you ever heard of Woodstock. It was a famous music festival in 1969. 
Oh, sure.  the Woodstock arts and Music fair was the highlight of 1969 if you don't count the moon landing.  Over 400,000  people attended.
Yeah, There were 32 performers that performed acts. It was huge at the time.
The hippies who descended on Max Yasgur's farm were drawn by what was billed as "An Aquarian Exposition: 3 Days of Peace & Music"