I'm a sheltered southerner and I don't remember the Black Cow. We had A&W as a chain that was popular back then. They had a great Root Beer float. Maybe it was called a "Black Cow" I can't remember.

Pomtzu, I do have a few fond memories of New England. I loved the grilled Hot Dog that had the flat buns and the "Awful Awful" sold at Newport Creamery.