In 1914 , the couple opened a dancing school in New York called Castle House , a nightclub called Castles by the Sea on the Boardwalk in Long Beach New York , and a restaurant , the Sans Souci . In 1914 , the couple opened a dancing school in New York called `` Castle House '' , a nightclub called `` Castles By the Sea '' on the Boardwalk in Long Beach , New York , and a restaurant , `` Sans Souci . ''