New York Yacht was the name of a building on Fifth Avenue, in New York City. This building, described as a "...gray old beaux...", along with the Metropolitan and the Union League, housed an yacht club. This was where wealthy New Yorkers who owned yachts, a type of recreational sea vessel, gathered to socialize in the early 20th century.
In The Big Good-Bye, this was one of the attractions on this avenue that drew the attention of the master criminal Silent Forrester as he was being chauffeured to the hotel Plaza. (TNG: "The Big Goodbye")