The Summer Island Playhouse was presumably a theater located in the Summer Islands on planet Deneva. It was a popular cultural site, visited by many Denevans over the years, including Vice-President Garson Tiernan and Starfleet Lieutenant Jasminder Choudhury. These two reminisced about their visits to the playhouse in the wake of the destruction of Deneva by the Borg in 2381. (TNG novel: Losing the Peace)

the planet Deneva
cities and settlements	Tellerton • Lacon City
landmarks and institutions	Summer Island Playhouse
geography	Sibir • Sibiran Range • Summer Islands
bodies of water	Aurelius Ocean • Bolsibir Sea • Iapetus Ocean • Terringen Ocean • Toran Sea