I've heard about Andersen, according to my friend though the karts there are only like 4.5hp briggs and due to the track layout you hardly have to brake? Plus, I know TBGP is open at night (ie after work for me) but if people wanted to do a weekend thing there is always Andersen or Ocala GP (briggs motors). Here is the info for their league:
The League | Tampa Bay Grand Prix Go Kart League