Musical Protective Union Building, Yorkville Casino, ca. 1912. The Yorkville Casino was a social club and community gathering space for the German community on the Upper East Side. The building was constructed in 1904 by the Musician’s Mutual Protective Union (the precursor organization to the American Federation of Musicians). One of the two large ballrooms in the Casino had a 15,000 square foot floor and was a popular nightclub. The building also functioned as a catering hall for personal and political events. The in house caterers were known for their excellent German fare and, of course, authentic German beer. The Casino, being so connected with the German-American community, was supposedly watched closely by the government during the Second World War. In the years after the war, as the neighborhood diversified ethnically, the Casino floundered and eventually closed in 1965.