Glad you said that PB. I can see it is a Sinatra style song BUT Darin owns Mack The Knife IMHO!!!
This is one of the really classic recordings: Ella Fitzgerald did a concert in Berlin in 1960. "Mack the Knife" had just become a hit, and it's the English version of a German song, so Ella thought it'd be nice if she learned the song for the German audience. That didn't work out too well, and so she had to improvise for almost three minutes:
Ha ha ha! I never heard that before. That is great!! What a pro. She didn't miss a beat.
TIS
"Mankind must put an end to war before war puts an end to mankind. War will exist until that distant day when the conscientious objector enjoys the same reputation and prestige that the warrior does today." JFK