Denny's Gift Card This Denny's Gift Card may be applied toward the cost of food, beverage and gratuity at any participating US Denny's Restaurant up to remaining value on the card. Redemption: In Store Only Denny's is America's diner. This is where Americans have come for over 60 years now to sit back, relax, and enjoy delicious, hearty meals 24/7, every day of the year. No returns and no refunds on gift cards.