The ads tell you to instruct your cab driver, "Sank roo doe Noo." Opened on Thanksgiving Day in 1911 by a bearded Hemingway precursor by the name of MacElhone, Harry's New York Bar is sacred to Papa disciples as the spot where members of the ambulance corps drank themselves silly during World War I. White Lady and sidecar cocktails were invented here in 1919 and 1931, respectively, and it's the alleged birthplace of the Bloody Mary and the headquarters of a fraternity of drinkers known as the International Bar Flies (IBF). In the street-level bar, daytime crowds draw from the area's insurance, banking, and travel industries; evening crowds include pre- and post-theater groupies and night owls. In the cellar, a pianist plays daily from 10pm to 2am.