Everyone will be buzzin’ on National Coffee Day. To be part of the daily grind, Dunkin Donuts is giving customers a FREE medium cup of its dark roast coffee on Monday, Sept. 29, 2014. Limit one per customer, per visit. Then, beginning Sept. 30 through Oct. 5, enjoy a medium cup of the same dark roast coffee for only 99 cents. Although most locations are on the East coast, there are locations nationwide.
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