Here's a photo of the joint! Known as Mike's Pool Hall in 1964.

https://twitter.com/garysoup/status/184693360223719424

Beat Generation book - see Page 81 for Dante and Ferlinghetti (and his minestrone-eating dog):

https://books.google.com/books?id=TvLu3q4SEgoC&pg=PA81&dq=dante+billiards+san+francisco&hl=en&sa=X&ved=0ahUKEwi38N7807DLAhVG5SYKHSMSDRgQ6AEIKzAA#v=onepage&q=dante%20billiards%20san%20francisco&f=false

Several other books make reference to Dante's - such as Golden Dreams:

https://books.google.com/books?id=gvFyunCAQbMC&pg=PT339&dq=dante+billiards+san+francisco&hl=en&sa=X&ved=0ahUKEwi38N7807DLAhVG5SYKHSMSDRgQ6AEIQTAE#v=onepage&q=dante%20billiards%20san%20francisco&f=false

Just a little hard to navigate, page after page, to get to the references. I'm going to bed now. I AM BEAT!