Dunks is a New England institution with a pretty fanatical following, at least for the coffee.

To put things into perspective, until very recently, the Back Bay subway and commuter rail station had TWO Dunkin' Donuts inside the station, within ~100 feet of each other, one on each side of the platform (on the floor above the platforms). One was smaller than the other, but you could literally hit someone in the other line with a thrown donut they were that close.