 The Jazz Age featured celebrities, among the most notable in the city were Madame Polly Adler; jazz singer Ella Fitzgerald; dancer Martha Graham; speakeasy host Texas Guinan; publisher Henry Luce of "Time" magazine; writer Dorothy Parker and the pundits at the Algonquin Hotel; editor Harold Ross at "The New Yorker" magazine; and such nationally famous sports heroes as Babe Ruth and Bill Tilden.Fun-loving Tammany Mayor Jimmy Walker presided over a period of prosperity for the city, with the proliferation of the speakeasy during Prohibition.Tin Pan Alley developed toward Broadway, and the first modern musical, Jerome Kern's "Show Boat", opened in 1927, as the theater district moved north of 42nd Street.