From 1941 through 1962, the Casino was home to The Valley Players, a theater company that produced plays and musicals throughout the summer. Among the cast members was a young Hal Holbrook who developed his one-man show Mark Twain Tonight and performed it for the first time at the Casino. When the Valley Players folded, Nikos Psacharopoulos established an Equity company called the Casino-in-the-Park Playhouse in the theater where, with directors Ted Mann and Keith Fowler, he produced an artistically strong but financially difficult season of plays by Shakespeare, Shaw, Brecht, and Tennessee Williams. After 1964 a succession of managers was unable to make the Casino financially viable again.