Southern Connecticut, Guilford, just off Exit 59 off of I-95. "The Place", 901 Boston Post Road.
It's a BYO-pretty much everything, including sides. What they primarily serve is grilled lobster, and otherwise grilled everything else. If it isn't on this menu, just bring it along:
You sit outside (covered if it rains), on stumps, around cheap tables. Drop the mussel shells on the ground when you are done.