We have a 600k this weekend. Jupiter to Melborne and around Lake O. Not too far from you, a couple of hours drive. There is a 200k also out of Jupiter at the beginning of each year as well.
Here is a link to the Central Florida group
Central Florida Randonneurs | Long-distance cycling in the Sunshine State
Gainsville does some
Gainesville Cycling Club
South Florida is here, with lots of perm
South Florida Randonneurs