There's an excellent documentary about the movie theaters of 42nd St. on either the Severin Films release for Zombie Holocaust or Grindhouse's Pieces blu-ray. Various actors & directors tell their experiences going to movies, hanging out, etc.
The Sleazoid Express book is pretty good. If you can find reprints of the original fanzine & the magazine he did in the '90s or early '00s (I think the title was shortened to just Sleazoid), they are well worth the money. I wish I had not sold off the Sleazoid's. His wife's zine was good, too, but I can't remember the title. It was mainly about porn & sexploitation. Metasex, maybe?