The one other place in the US that I know of, other then those mentioned, where you can legally drink in the streets is Savannah, GA. It's true that it's a big draw for both cities and it was enough of a draw that I moved to Savannah and reveled in it night after night for six months. That town's actually worth a visit if you're ever near by. It's like a miniature New Orleans in a way.
If I lived in Europe, I doubt that the US would be too high on my list of countries to visit when there's so much at the doorstep there. I can hardly imagine how difficult and expensive it would be to visit here from another country and try to get around and actually be continually entertained. Can you imagine dropping thousands of dollars and find yourself driving around the midwest? Oof.
One of the best and most impressive things that this country has to offer is it's national parks and, sadly, not that many citizens here even take advantage of them. Shit, I've still never been to Yellowstone.