The Knickerbocker Club, New York.

The Knickerbocker Club, known informally as "The Knick", is a male-only social club in New York City. The Knickerbocker was founded on Halloween 1871 when certain members of the Union Club became concerned over a relaxation of admission policies at that association. As reported widely, including in The New York Post in September 2009, ethical and, in some cases, criminal allegations have involved several members of the Knick. Of these, convicted felon Anthony Dryden Marshall (he remains free while appealing his conviction of robbing his mother, Brooke Astor) is currently a member.

The club's present clubhouse is located at the corner of Fifth Avenue and East 62nd Street in New York City, across the street from 810 Fifth Avenue. Built in 1913, it was opened June 21, 1915. It was designed by William Adams Delano of the architectural firm of Delano & Aldrich. Paul Goldberger calls it "one of the most beautiful Georgian-style buildings ever created.