But in the second half of the '70s, with the invention of the videocassette recorder and a proliferation of video cassette rental stores, the demand for adult movie theaters began to plummet. Realizing that they needed a new business model for their building, the Mitchell brothers sent manager Vince Stanich around the country to explore customer-contact shows in sex clubs. After Stanich reported back, the Mitchell brothers responded in 1977 by opening three new rooms at their O'Farrell Theatre featuring customer-contact shows: The Ultra Room, The Kopenhagen, and New York Live. The Kopenhagen's shows were performed by a pair of naked women in a small room with about twenty men. However the club's most profitable new venue was New York Live, which was a cabaret-style strip club act with women dancing three song sets upon a stage, while usually being totally nude for the final song.