20% off deal at Denny’s Aug 182013 If you're new here, you may want to subscribe to our daily email updates. Thanks for visiting!Purchase an entrée at Denny’s and receive 20 percent off the whole tab. The offer is sent by email upon request from Denny’s Facebook site. Some restrictions apply. The offer is valid to August 26. The deal requires a coupon, which is sent by email. Sorry, the comment form is closed at this time.