I don't think the number of brands on offer has any effect on our relationship with booze. It doesn't matter how many brand of yellow mustard are on the shelf, I'm buying it at the same rate. Where I live now, very few super markets have beer/wine and none have spirits. I know I buy less booze now than I did when I lived in places where you could get beer pretty much anywhere, at gas stations, super markets, convenience stores, etc., and it's probably for this reason.