What’s That Building? Oh, just another Chicago spot with a pretty wild story. The old McCormick mansion on Ontario Street has been reinventing itself over the decades. It’s been closed since 2020, but now the historic building is going from a prime rib spot… to a new immersive magic venue. Chicago architecture sleuth Dennis Rodkin brings us the inside scoop. For a full archive of In the Loop interviews, head over to wbez.org/intheloop.