Shake Shack, Chicago Athletic Assoc Hotel, 12 S Michigan Ave, 312-646-6005. Shack burger $6, crinkle fries $3 Concretes and shakes $4.50-$6.

Shake Shack offers free Shack Sandwich every week in December

← Free Sauced Night Market Skate in the Clouds at Peninsula Sky Rink → Shake Shack offers free Shack Sandwich every week in December POSTED BY Living on the Cheap Shake Shack is definitely making the holidays a little merrier for hungry bargain hunters! This December , the popular eatery is gifting customers a FREE Shack Sandwich — with a new burger or sandwich available every week. It’s the perfect excuse to take a “bargain break” from running holiday errands. Use the money saved on m