1 Meet the cast of MTV’s ‘Siesta Key’ reality show. 2  MTV’s ‘Siesta Key’ reality show premieres July 31. 3  Siesta Key Beach is No. 1 in U.S. again, ‘Dr. Beach’... 4  The reality of Sarasota-Manatee’s TV past. 5  People overreacting to MTV’s ‘Siesta Key’.