[1] At the time, American tourists and members of the artistic and literary communities were beginning to show up in Paris in ever-increasing numbers and Sloan hoped to capitalize on his fame and make the place a spot where expatriates would feel at home.
His bar did become a popular spot for members of the American Field Service Ambulance Corps during World War I.
[4] Over the years, Harry's New York Bar was frequented by a number of famous American expatriates and international celebrities such as Prince Serge Obolensky, Knute Rockne, Sinclair Lewis, Ernest Hemingway,[5] Daft Punk,[6] Bill Tilden, Coco Chanel, Jack Dempsey, Primo Carnera, Ramon Novarro, Aly Khan, Rita Hayworth, Humphrey Bogart, Brendan Behan (who worked there circa 1948–49 according to his memoirs Confessions of an Irish Rebel), and even, occasionally, the Duke of Windsor.
He followed the instructions in Harry's advertisement in the Continental Daily Mail, and told his taxi driver "Sank Roo Doe Noo".
In his novel Le tour du Malheur, book 3, chapter VII, page 301, Joseph Kessel takes his characters to an American bar in rue Daunou.