While I agree that it's goofy, I think that's kinda the point. Sometimes you just gotta let loose and be silly. In this instance, that means putting on a show that loosely resembles da Vinci's Last Supper before having a blue Dionysus suddenly pop out of a serving tray. Is it ridiculous? Sure is, but that's what makes it fun.

(I read people saying that it was supposedly to was meant to be The Feast of Dionysus and not The Last Supper; which makes a bit more sense because then you'd be drawing entirely from Greek mythology instead of a weird mix of ancient Greek and modern Christian beliefs.)