I know that there's been a regularly-scheduled Monday night PFS group playing at Chicagoland Games / Dice Dojo, which is on the far north side of the city (http://www.chicagolandgames.com/location.php). According to the store's web site, they're scheduled to be playing on Monday the 12th, but I'm not sure who's the organizer there these days.
No scenario selected yet for the 12th.
The store is at 5550 N. Broadway (about a two minute walk from the Bryn Mawr stop of the Red Line, if you are of the mind to use the CTA to get around).
Sign-up will be at Cowsgaming.org, and if you have any requests for what you'd like to play you should probably let it be known.