Alcohol

Keep the glasses and a pitcher of the vodka in the freezer (for at least six hours before the party) so that you can provide instant gratification to each arriving guest. A medicine dropper is a great vermouth dispenser.

Set up an assembly line to make six or so of these lovely cocktails at a time: Fill each glass with the liqueurs, then top with Champagne. Flutes are elegant but not essential.

This is said to be the cavalryman's answer to Artillery Punch.