See all of our limited-time-only menus, locate your nearest Denny's and most importantly, play the Denny's 50 State Challenge. An exciting, interactive race across America, where the first person to check into a Denny’s Diner in all 50 states will win FREE GRAND SLAMS FOR LIFE. There are great discount coupons, souvenirs and badges to unlock along the way. Click on the App Store or Android Marketplace button below to download and start checking in.