Performance Sail & Sport
http://www.performancesailandsport.com/index.html has Hobie Wave races every Thursday night and a High School Sailing Program (notice the link on the left side).
Performance is located 200 yds north of Pineda Causeway on U.S. 1 between Melbourne and Rockledge. Should take you about 50 minutes from Orlando.
When you call you can speak with Scott Hubel. 321.253.3737