St. Pete Stand-Up Crew on Facebook.
https://www.facebook.com/StPeteStandUpJetskiCrew?ref=br_tf
A lot of buoy racing but other kinds of riding on occasion too. Today the guys were riding at the skyway. Lake seminole is the most common spot. Also ride at 10 cent (The beach by the bridge to Tierra verde). Pretty regular group of 2 or 3 full limited RN superjet, a 800 SN, a 900RR superjet, a Bullett 1100, 2 SXR1100, 2 951 Hydros, couple of stock and limted SXR, and that's just the regulars... Sunday is the most common ride day, almost every sunday a few people are meeting somewhere. We met in Bradenton a few months ago with the Pro-Hydro-X guys and they brought their 8-10' ramp. Was pretty cool.
If you want more of the surf free-ride scene, you can catch those guys through the forum here that was linked a few posts ago. Those guys usually ride dunedin causeway.
Regardless of which of those 2 crews you ride with, both will expect you to bring and wear a helmet. Of course we can't make you, but it's in everyone's best interest.