As if we needed extra incentives to go to Dunkin Donuts. They have delicious donuts and coffee to die for. What more could you ask? Dunkin Perks! You can enroll in Dunkin Perks and you will get a coupon for a Free Medium Beverage (including tea or coffee drinks). You will also get a Free Medium Beverage of your choice on your birthday! That’s a cool perk. Enroll in Dunkin Donuts Dunkin Perks today and get your coupon for a Free Beverage.