Fatso's is still open up at 1010 E Busch near Nebraska. When I worked there that was a one pocket hot spot. There are a number of one pocket players there normally, at night. During the day they used to hang out at Baker's, downtown near the interstate on Tampa Blvd.
I don't know the one pocket hangouts in St Pete or Clearwater, I'm primarily a 9 baller, myself, but I like to watch one pocket. Good strategy play.
We always have 1P action at the Flamingo in St.Pete, couple players over at Crooked Cue in Largo also, not sure about CM'sPlace in Seminole, Vickery & Martin played there some years ago, I have not been out that way in a very long time.
After Ken sold the place to Strokers, it did not last long, I saw a thread recently on AZ where all the equipment is up for sale.
It was a great place back in the day, tournaments, action, always packed on Friday and Saturday nights, really cute girls behind the bar and bringing drinks out to your table.