Guy Gardener wrote:
The wedding is paying for the drinks. I'm assuming it's an unlimited package, rather than itemizing for 200 guests, or a package for 200 guests.
I know this is just a TV show, but that doesn't seem feasible in real life. They did not rent out the entire hotel, just a block of rooms for the guests. Otherwise, there would not be guests in the hotel bar that are unknown to Robin and Lily. Without wristbands or some other means of identifying those who are entitled to unlimited beverages, the bar staff wouldn't be able to differentiate the regular customers from the wedding attendees.
Every "open bar" I've ever been to either had closed doors to guests only, or wristbands of some sort that you could flash to the bartender to not have to pay for your drink.