No, Dunkin Donuts doesn't take Apple Pay yet, but... you can load your Dunkin card into Passbook and set it to mirror to the watch. Open the watch Passbook app, tap the Dunkin card and bring up the QR code. Raise your wrist when they tell you the cost and watch the stupid look all over their faces. I actually had one employee who wouldn't scan my watch until she got "permission" from her manager.