 Harry B. Hollins belonged to the Union Metropolitan, South Side Sportsmen's, Knickerbocker Club, New York Yacht, Meadow Brook, Racquet and Tennis, Riding, and Garden City Golf Clubs, also the Automobile Club of America.He also served on the board of the Vanderbilt Motor Parkway.On April 3, 1900, seven men from the International Banking and Trust Company were elected as directors of the North American Trust Company.