Somehow I just discovered this thread. I came out in 1981 in Champaign, IL (a college town 120 miles south of Chicago) and discovered adult bookstores when I was 16 (and a senior in HS). I loved them. Loved the glory holes, and anonymity.
Best story is that once I was getting a blow job, came in the guy's mouth and when we exited the booth at the same time, I saw that the cocksucker was my HS classmate's FATHER. I'd been to their house and met him several times. He smirked at me and I freaked and high tailed it out of there. I later discovered that he was a total cock pig. I was kind of sghy and hooking up in ABS was easier than meeting people in the gay bar (which let me in since the drinking age was 19 still and they were not picky about IDs).
Ironically that ABS later (in an old building, it had probably been a store at one time) became a storefront church. If those walls could've talked, they would've said "psst...wanna blowjob?"