Chicago will transform the building's 94th and 95th floors into a multilevel observation deck, while the 96th floor will become a private events area.

The Signature Room at the Hancock Center served a buffet at a cost of $36.95 per person and expected 17,000 for dinner. The 95th Restaurant in the Hancock Building in Chicago, circa 1971.

The brand signed a lease for a ground-floor location at North American Real Estate’s 605 North Michigan Avenue, taking over ...