There are several fliers that get together at Halpateeokie Park in Stuart at I-95 at Kanner during the week in the mornings, and Saturdays at a High School right off Cove and Kanner. As far as Port St. Lucie, there has not been any
organized flying there since 2003 that I know of.
If you need contact info, email me for info.
Robert Compton