Stayed in Waltham as a base for a Boston weekend. Chose The Gaff on the night of our arrival based on tripadvisor reviews and we were not disappointed. You need to know going in that this is not a restaurant, it's a bar. There are five or six small bar tables along the wall opposite the bar and a small lounge area by the door. When we arrived all the tables were occupied but there were two seats at the bar so that's where we sat and ate. The bartender was friendly and knowledgeable. The food is definitely not your typical bar fare. The food menu isn't extensive but what is available is prepared expertly and is very good. My husband ordered the steak sandwich and was warned it was spicy, which he was fine with. It did have a good kick to it. He was impressed that the cut of steak was extremely tender and tasty. I ordered the bistro chicken and was equally satisfied. All in all, a very satisfying meal.