I used to. It was called the Studio of Bridge and Games. It had a small front room, 20 x 80'?, a large back room, 120' x 80'?, and a closed off confrence room that was sound-proofed and with comfy chairs, 12 x 20'?. There were as many folding tables, card tables and folding chairs as you needed. There were some games for sale, as well as dice, but the selection wasn't very good. Bathrooms and a kitchen were also available, and they served tea, coffee, and fairly bogus snacks. The price was $2.50 per session, which ran from 10-6 and from 6-2 am. DMs were free (minimum table of 3 players).
Saturdays were fairly packed, there were a few Sunday afternoons and Thursday nights. The center ran a minor convention in the spring where you stayed all weekend and a major convention in the fall that came to be hosted elsewhere.
It was a fun time. There were 20-40 people at any given session, about half were 14-20, the rest were older. At most there were 6 games running at a time. The main owner was a cranky son-of-a-gun, but the other people were nice. It was a great exposure to the gaming community. I had never heard of games like RuneQuest, Twilight 2000, Space Opera, Traveller... I met some great people (like Cerebral Paladin's pal, Reynolds) and was exposed to a wide range of people, from saints to scoundrels. Got a couple of dates out of it too.
Now, that's when I was 15-18 yrs old. I wouldn't do such a thing now, given I have a family with a young child. But, there were other older adults there.
Edit: You know, now that I have been reminising, I think it was $1.50 per session. It was about 20 yrs ago, hard to remember.