Tremont street could be the toughest neighborhood in the city for a restaurant without game. You have 28 degrees, Masa, Tremont647, Sibling Rivalry, Hammerslys' Bistro, Butcher Shop and The Acme Oyster House plus two streets in either direction adds another dozen decent places to eat.
Happily, Addis has game. It is a dimly lit interior with ( I am guessing) authentic Ethiopian tables and chairs. We had Samusas for an ap, which is like Indian Samosas. We ordered a chicken and a vegetarian dish for the main course. Ethiopian food as it turns out is somewhat like Chinese Moo shi, meaning you roll it in bread and eat it sans silverware( must save them a fortune in water and related costs)...But it was very different and very tasty
The only bummer is that you have to hunt for parking and you may need to stretch out a bit afterward. But for a new food experience, I would(and have) recommend it