You can definitely buy wine and beer in the supermarkets and convenience stores like 7-11 and Krauszer's, at least where I live.

Maybe different counties have different regulations about that, but it's OK in Hudson County.

I'm pretty sure the number of liquor licenses allowable is by town, not county, and has to do with population.

Go to Hoboken. There's a bar on every block, and just about every restaurant has a liquor license. But here in Secaucus there are only like two bars, and several restaurants which are BYO.

Also, and again this may apply only to Hudson County, or just ppossibly only my town, but although you can buy liquor on Sundays, you have to wait until 12 noon.