Chicago’s new theatre for mid-size arts companies had its debut over the weekend. It’s not the warmest space to be in, reports Sid Smith. But “on the plus side, the seats are comfortable, and a steep rake, especially in the balconies, makes for superb sightlines, particularly for dance. The well-equipped stage is wide and deep, but flexible, able to accommodate both the large corps de ballet from George Balanchine’s ‘Serenade’ and the natural intimacy of duets during Saturday’s inaugural gala.”