No advice about meet ups or groups--I'm not from that area. But there are a couple of tips I can offer from first-hand experience....First, lovely beaches to play with and use as backdrops for shoots. Second, there are a ton of commercial orchid farms there so get your flower photographer mojo going. Third, google "Ringling" and "Sarasota" and look at all the diverse hits you get there. The Ringling School of Art and Design is a good place that is likely to have some possible options for you (models to shoot, classes to audit, possible assistants, exhibits). You've got a host of Ringling resources in and around the area (museum, old mansion), there is an old Ringling hotel that is abandoned. You could spend a year just shooting stuff that has a Ringling angle to it. I believe they've got an annual "Chalk Festival". If you go north of Sarasota just a bit, you get to Ft. DeSoto which is a great place to shoot (either for landscapes or as a setting or wildlife), one of my favorite places in Florida. You've got baseball spring training going on right now...I think the Orioles are based in Sarasota and the Twins in Ft. Myers so something to go for if you shoot sports. Sarasota itself has quite an arts community so a photographer should be able to find quite a lot of amigos very easily.
Now all this is just what comes to me off the top of my head...I'm sure with a bit of research you'll come up with a lot more.