[ ...is he genuinely asking her to explain cosmetics? with only a few curls released, she leans forward and claims the pot of powder. rolling her eyes as she does so. ]

It's generally not the done thing to turn up to these things alone. [ which peggy most assuredly will be if tony doesn't deign to agree. besides, nearly everyone peggy actually knows with any kind of confidence is involved in the ceremony itself. ] Wear a suit, show up, eat dinner at the same table. And then you're welcome to duck out.