Thanks to all of you for your advice. Went to Lunch today. Only two steps to the indoors, very steep staircase to the patio. Sat indoors. it was almost completely empty at 1:00. Oysters were excellent. The rest of the stuff was just ok/ the lobster roll was very ordinary. The roll was soft, not toasted or buttered and soggy on the bottom. The lobster salad was lobster with a little mayo, no celery or anything. Rather plain and uninteresting. The fries were excellent.
One DC had the fried calamari which was just ok-very ordinary and not crispy. The other had the italian fish stew. Very so so. so, what, other than the oysters, is so great about this place.
I was glad I didn't go at dinner and wait in line.
Service, btw, was excellent.