Un-beer-lievable Ignorance, Part 2

I’m working concessions at a rock concert in a large sports arena. Invariably, there is a “last call” about an hour and a half before the headliner is scheduled to end. This means that alcohol is not served anywhere in the venue after that time. This conversation happens more than once:

Customer: “Can I get a [alcoholic beverage]?”

Me: “Sorry, alcohol is cut off. They won’t have it anywhere in the building.”

Customer: “How about a beer?”

What do people think is in beer?

Related:
Un-beer-lievable Ignorance