Was in a brewery in South Carolina, tourist asks the bartender for a bud light. Bartender politely explains that it's a brewery, make their own beer, and directs him to a beer menu. Tourist says, "just give me whatever is closest to a bud light." Absolute monster.
I used to work for a large craft brewery. We'd have the same sentiments sometimes.
Someone was furious we wouldn't sell them a keg of Miller. Homie, I don't know how to explain this better, but we only sell the beer we make and that ain't it
Kegs aren't even hard to get. If he really wants that keg he can just call the nearest distributor and they'll be happy to hook him up. They might even deliver it.
This is alcoholic behavior. The alcoholics I know that drink beer (vs wine or whatever) absolutely drink only light beer by the gallon and will order it wherever they are.
If I didn't like beer, didn't know it care about meet, but felt I needed to drink it socially to "be a man", that's exactly how I'd approach the problem.