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.