Last time I was in Boston, my friends and I stayed at the Eliot Hotel, right down the street from Fenway. They have a sushi restaurant named Uni in the lower level that has delicious late-night ramen on the weekend. Give it a try if you’re in Back Bay.
https://uni-boston.com
Speaking of Fenway, we ate surprisingly yummy BBQ at a place called Sweet Cheeks, right before attending a Red Sox-Yankees game. I had a fantastic lobster roll at famous sports bar The Fours just before heading to see U2 at TD Garden (yeah, it was a full weekend). Enjoyed excellent seafood at Atlantic Fish Company, also in Back Bay
https://www.sweetcheeksq.com
http://thefours.com/boston/
http://www.atlanticfish.com