Diner fans can grab their slammin’ summer fits and collectible mugs at DinerDrip.com Denny's NEW Summer Merchandise Denny's NEW Summer Merch Available on Dinerdrip.com Spartanburg, SC, July 24, 2025 (GLOBE NEWSWIRE) -- It’s Suns Out, Slam’s Out, diner fans! Denny’s has dropped all new merchandise on DinerDrip.com, including nostalgic summer fits and 4 Under $10 collectible mugs. Available now and while supplies last, fans can rep their love for Denny’s in style. Whether sipping coffee or soaking up the s ...