Continuing with a few more postcards. This one was postmarked May 25, 1967. On the back: "The Gibraltar Room, Prudential Building, Chicago, Ill. The comfort and beauty of a club-like atmosphere... supremely satisfying Stouffer food and service... and a sweeping view of famous Michigan Avenue!"
Another "Stouffer" restaurant that probably only lasted until the 1970s. And yes, they're the same company that went on to make frozen foods.