Duplex Diner Claim Listing Return to Directory Rating (average) (0) Business Genre Places, To Eat Business Website Address duplexdiner.com Business Address, City 2004 18th St NW, Washington ZIP Code 20009 Business Phone Number 2022659599 Ratings There are no reviews yet. Please login to leave a review. Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password?