http://www.robertoswatersports.com/index_files/contacts.htm
"You can find ROBERTO'S on the beach in front of the Holiday Inn and in front of the Marriott Ocean Club. Open between 9.00am and 16.30pm. Please pass by, give us a call or e-mail us for more information or to make your reservation.
There are vendors all along Palm Beach offering all types of watersports, parasailing included.