I still went to a mall in about 1998, where there were 3 stalls, with big (2.5") glory holes in them. Got sucked off there a few times. you could easily feed your whole cock through. Was also caught there almost once. I was taking a pis at the urinal and the security gurd came in. I made a dash to other toilets. a while later, he was also there. Turned out he just wanted a jerk off buddy.
Knew other toilets which also had a huge hole, about 2", the stairs were noisy, so you could hear if people came close. also had a few god ones there. They all seemed to close down at around 2000. Do not find many these days. Both places had wooden partitions.