Mack the Knife parody, about reviews of Jonathan Gruff as Bobby Darin on Broadway
 In parody tribute to the reviews about Tony frontrunner (and Tony winner last year) Jonathan Groff as Bobby Darin in "Just In Time," "Mack the Knife" Parody on YouTube https://youtu.be/R3eaFLReem8 - noting that the reviews praised Mr. Groff's performance as sensational, and the critics AND the show also pointedly warned that Mr. Groff spits and perspires a lot, so be aware if you're in the front rows.  (Ha…