When I was in high school the demand for alcohol was broader than the demand for cannabis -- ie, more students were interested or willing to drink than they were interested in smoking pot.

What's curious, though, is that there wasn't really a black market for booze. As in, someone of legal age who bought booze specifically to sell it to underage high school kids. You can almost imagine some person with a couple of cases of half-pint vodka bottles and cases of beer who sells them off to high school kids, either direct consumers or as a wholesaler to some enterprising high school student.

Everyone seemed to have some inconsistent access to someone of age who would buy booze, but it was really inconsistent as I remember it. You mostly couldn't call them up and say you needed a hookup tonight. I even remember a couple of times where my circle of friends went through the motions trying but getting turned down by everyone.