These are a few things I've found for writers to do in the area:

Winter with the Writers, Rollins College

http://www.rollins.edu/winterwiththewriters/

Annually, each January-March

One Word at a Time, Kissimmee Writers Group

http://fwaosceola.blogspot.com/

Second Thursday of every month

Celebration Writers Group

http://www.celebration.fl.us/groups.html

Every Wednesday

Harmony Creative Writing Class

http://harmonywriters.tumblr.com/

Last Tuesday of every month

Know of more? List them here!