On any given day, the musical I consider my all-time favorite will either be Sweeney Todd or Guys & Dolls ... unless that day is the day after I've seen a production of Guys & Dolls, in which case it's the clear winner. Heaven knows there are plenty of entertaining, tune-filled warhorses from Broadway's golden era, but do any of them have the effervescent fizz and pop of composer/lyricist Frank Loesser's 1950 triumph, a beautifully constructed musical comedy so funny and clever and sweet that it can keep you happy and humming for hours - like, 100 hours - after it ends?