Actually, one needn't even go to the trouble of seeking out a pub: an above-average fish and chips can be found at your nearest Red Lobster, and you'll even get vinegar, should you desire it (note: vinegar is often misunderstood by Americans, who cannot get past its pungency).
That said, if you're British and if you're thinking of relocating to The States, be sure to check out your local British-style pubs if ever you get the same craving I did today. It is in these where fish and chips tends to be more like what you would get back home.
Of course, fish and chips is only truly authentic when accompanied by the obligatory side of mushy peas. Unfortunately, America hasn't really warmed to this idea yet, though if you're happy to cook your own fish and chips, Meijer typically sells pre-made mushy peas on its British aisle.