Since it first opened its doors in October 1907, the Plaza has been the hub of glamour and culture in New York. It is where F. Scott Fitzgerald lived during the Jazz Age, where Frank Lloyd Wright stayed while building the Guggenheim Museum, where the Beatles bivouacked when they invaded America, and where Macaulay Culkin stayed after spending all that time home alone. It's where Liza Minnelli grew up and Eloise acted up. Ward Morehouse III,...