The Pump Room, established October 1, 1938, by Ernie Byfield, is a restaurant located in the Public Chicago Hotel, formerly The Ambassador East, in Chicago's Gold Coast area.
The restaurant served a number of celebrities who were regular customers and has been written about in books and articles. Lucius Beebe, gourmand, author and journalist, included references to The Pump Room in some of his books and articles. Arturo Petterino (1920–2010) was its maitre d' for many years, steering celebrity patrons to the coveted Booth One. Famous guests included Frank Sinatra, John Barrymore, Judy Garland, Bette Davis, Beverly Sills, David Bowie, Natalie Wood and Robert Wagner, Paul Newman and Joanne Woodward, Humphrey Bogart and Lauren Bacall, John Steinbeck, Ronald Reagan, Paul Harvey, Helen Hayes, Clark Gable, Sammy Davis Jr., Jerry Lewis, Dean Martin, Elizabeth Taylor, Lena Horne, Joan Crawford, Tallulah Bankhead, Audrey Hepburn, Liza Minnelli, Robert Redford, Bill Murray, Josephine Baker, Phil Collins, Gertrude Lawrence, Eddie Fisher, Michael J. Fox, John Belushi, Eddie Murphy, Gene Wilder and Gilda Radner, Mel Brooks, Olivia Newton-John, Peggy Lee, Mick Jagger, Sid Yiddish and many others.