On National Chocolate Chip Cookie Day, DoubleTree by Hilton celebrates the warm welcome that has become synonymous with the brand: an original, warm DoubleTree chocolate chip cookie at every check in. To celebrate this holiday, DoubleTree by Hilton is once again inviting both travelers and local community members to stop by any DoubleTree by Hilton hotel in the U.S. on August 4 to enjoy a complimentary DoubleTree chocolate chip cookie – no reservation required.