There are many videos online of the street racing, stunt driving and car enthusiast scene at the Riverside mall parking lot in the McKinley Park neighborhood. We'll share what we find here in this Forum thread.
This video is from one of the main vloggers on the local car racing scene, and it contains his comments on how the Mariano's/Riverside parking lot is no longer a destination because of the access control they've put in place. The video includes a bunch of footage of where the racers went instead.
Another video from another street racer vlogger shows a meetup this past winter at the Mariano's/Riverside parking lot, as well as more footage from around Chicago: Lower Wacker Drive, South Loomis Street just north of the Chicago River, etc.