No, it was the Blue Stag School in Chelmsford. I shudder to think my description could apply to more than one place.
There was a MA Dealer in Norton whose home fit that description . . . well at least the kitchen did . . . I never ventured further than that into his home and only once at that.
The guy you refer to always has a table at all MA gun shows (and NH too, IIRC).