Dunkin Donuts will still serve donuts but it's changing it's name to simply 'DUNKIN'.
According to Wikipedia:
Dunkin Donuts was founded in 1950 by William Rosenberg in Quincy, Massachusetts. Since its founding, the company has grown to become one of the largest coffee and baked goods chains in the world, with more than 12,000 restaurants in 36 countries...
In a scene we haven’t seen since Judge Reinhold fought off a robber in ‘Fast Times at Ridgemont High,’ an employee at a Dunkin’ Donuts in West Haven, Connecticut broke up a robbery by tossing coffee on the would-be thief.