I had contacted my professor of interest before submitting an application about scheduling a meeting and was told to schedule through the department secretary. Once I submitted my application, I contacted the secretary and she set me up an appointment with the professor. I've done this with every school that I have applied to---simply scheduled the visit/interview without waiting to be contacted. Some schools I've visited/interviewed at before submitting my application, some after. I am still a prospective student with no admits, but I am assuming that if UChicago had already decided who they were going to admit, they wouldn't have told me to come visit next week!