Blackmarket alcohol is not uncommon in the US. Particularly among poor white and hispanic populations. Most cultures have their equivalent of moonshine. You can easily buy illegally manufactured alcohol in every corner of Appalachia, basically all of the south, and poorer areas of every blue state including California and New York (most of NY being rural, and not particularly affluent, there's a healthy trade in illegal alcohol there as well, it is then sold in NYC as well).

You can get hooked up with illegal alcohol in basically every liquor store in every state in Appalachia, if you know someone that works there. It's commonly sold under the table so to speak.

edit: for wherever the downvotes are coming from - yes, I do know this stuff for a fact. I grew up in Appalachia, I know for a fact that what I'm saying is extremely common, I saw just about every aspect of the illegal alcohol trade first-hand. From that I came to learn second-hand the scope and nature of it up and down the east coast of the US and other parts of the country. It's easy enough to google this subject as well if you're skeptical.