I know in NJ a few years ago, legislation was changed (and challenged in the courts) on collecting taxes from liquor "purchases" from private clubs and casinos. Atlantic City casinos were impacted the most: how do you capture tax when you're giving the product away for free? While I'm sure someone here knows better than me, I believe a mechanism had to be put in place (whether its in an airline club, a country club, a private club, or a casino) to track how many drinks are being "purchased" so tax could properly be assessed. So when you see a cash register in a PC club, its probably to track inventory and collect tax where such tax is collected.