Poseidon's Playhouse is Hightower High School's Thespian Troupe #5864. Established in September 1998. Our troupe members are a part of the International Thespian Society. ITS is a worldwide theatre honor society.  The International Thespian Society is a division of the Educational Theatre Association. We are proud to be one of 3600 secondary Thespian Society troupes across the country.