Alcohol is famously super high margin, though. People will pay like $5-10 for a 54¢ shot of Costco vodka or rum at a comedy club and another $5 if you mix 10¢ of cola into it, you simply can't get the same margins out of even very expensive feeling food which usually needs more labor and prep.

In addition, alcohol lowers the bar for entertainment. Comedy, music, dancing, none of it has to be as good to satisfy if people are at least a bit tipsy, which makes the performers happier, and the customers happier.