The 1960's were a interesting time and the music reflected the era. The social media of the time were the posters that were plastered on telephone polls, empty buildings, storefronts, etc. The Haight Street Art Gallery had an exhibit based on the birth of these posters
Bill Graham was a music promoter who along with Chet Helms led the so-called San Francisco music movement during this time.
This is the first poster that Bill Graham had done:
As time went on, Graham started working with local artists to develop the psychedelic look of the posters
It was really cool seeing the birth of a whole movement and these posters are so very cool.