Shake Shack is giving fans eight days of holiday freebies, which began on Dec. 16. and runs until Dec. 24. Users of the Shake Shack app can enjoy a free sandwich every day from now until Christmas Eve by using the code “BURGERBLITZ” at check out with a minimum purchase of $10. The code also works for in-store purchases, though not for orders placed through Shake Shack’s website. Today, Dec. 17, you can grab a free SmokeShack burger with a purchase of $10 or more. The SmokeS...
