The frequent references to Yale University are nods to the musical's composer, Cole Porter, who attended Yale.
Sutton Foster won her second Tony award for Best Actress in a Musical for her performance in this show on Broadway.
Evelyn attempts to quote James Cagney by saying "You dirty rat" again and again, causing Billy to guess that he was quoting Noel Coward. Cagney never did say "You dirty rat" in his movies. The closest thing he said was "Come out and shake it, you dirty, yellow-bellied rat" in the film 'Taxi'.