Park in the big lot on the NE corner of Lamar and Belleview. It has a big pay-slot thingy, but you don't have to pay. I guess you can if you really, really wanted to, but you seriously don't have to pay. Enter the South Side building through the front entrance on Lamar, up the elevators to loft 911.
The front door of the building is on Lamar, and there you will find a concierge station and three elevators.
We will be on the 9th floor, loft 911, right next to the elevators.