The Mies van der Rohe Society hosted a cocktail reception and tour of Helmut Jahn’s elegantly simple 600 North Fairbanks glass tower last week. Two of the light-filled units, with signature concrete walls, posts, and ceilings, together with floor-to-ceiling windows—were furnished and decorated by Jennifer Sweas, a local interior designer. I loved the way Sweas did the unit shown here; it goes to show that modern does not have to be cold. The other model, the penthouse, is equally stunning. I ran into a couple of tenants in the elevator; they seemed very happy living there. Think you’d be, too? Don’t dally. Only ten units in this 41-story building are still available.