Old Postcards - City Lights Books

There is an "antique" store in Charlottesville that I can usually find some interesting post cards. They are old, but generally unused, which means I can mail them to someone.
I was surprised to find this one. Its a picture of City Lights Books in San Fransisco, probably from the 70's based on the appearance. While the card had been "used," it hadn't been mailed. The back of the card had a poem written in magic marker. I can only speculate on the source, and I certainly can't speculate on the meaning.
Lawrence Ferlinghetti founded the store in 1953. He also spent some time here in Charlottesville while teaching a course at UVA. He shared a house with a friend on Park Street, which is about two blocks from where I'm living.
I also included a detail scan of the people in front of the store.