You pay $8 and you get a free beer/soft drink after the run and they have a little prize draw where you can win a few goodies.
It's a nice way to spend a Tues eve, route goes down by oriental parade, and starts and finishes at the Chicago sports cafe. If you join the club, they even record your time and you can see how you're doing each week, and try and get quicker.
Also it's not a whole bunch of professional runners, the group is a mix of old and young, slow and quick, but all are super friendly. I look forward to trying to get a group going to this!