Hack the Stack: Denny's Celebrates National Waffle Week with BOGO Deals, DIY Waffle Sandwiches and Social Giveaways

(DNH) From irresistible waffle sandwich creations to crave-worthy prizes, guests are invited to stack, share and win September 7-13 SPARTANBURG, S.C., Sept. 3, 2025 /PRNewswire/ -- Denny's is taking waffles to the next level for National Waffle Week with a crave-worthy celebration of...