They then take the hired woman and ply her with champagne. Plied externally rather than internally. They've already gone through three bottles, are currently pouring three more, while their butler has three more 'on deck.'
What strikes me immediately is the butler's ability to look the other way. This sort of thing must go on all the time and he's trained to not pass judgement.
In addition, all three champagne wielding gentlemen seem to be aiming their spouts at one particular part of the fraulein's anatomy. The guy on the left hasn't quite gotten his to flow.
I would love to see what transpires over the next few hours. After that I'd love to see what the butler has to clean up the next morning. I'll bet those tuxedos will need to go the chemische Reinigung. Hope the guests brought a change of clothes. Otherwise they me be going home wearing borrowed kleider.