I think in Texas, liquor laws are actually determined by voting precinct. Up in the Dallas area, you get some pretty weird outcomes because of that.
Two grocery stores can be across the street from each other, but one sells beer and the other can't if the precinct line is the same as the street.
It's the same thing with gambling at a national level.
Now you have me thinking -- I think it isn't just voting precinct either, but cities as well. I'm not 100% sure of this but I recall signing a petition for Euless to sell wine because everyone was crossing the street into Grapevine to buy it (wave bye bye to the tax money).
I'll do some more reading -- I'm betting though that it may be city, precinct, county, state -- all of the above.