Hey Chicago friends and readers. I did some digging for you and, you don’t need my list. Amy of FreeYogaChicago.com has already done it!
I wish I knew about this when I was living there. Not to mention that some of the classes are at my favorite studios like Moksha and Bloom.
Now Chicago, as winter engulfs and you are enveloped by the dark long night, get your butts to some classes.
Get warm in your body, mind, and soul. Then share it with a loved one. You’ll be better for yourself and your homies.
prana project 
Lovely Dia! One cool thing to add – Tula yoga also lets you “share” an unlimited pass with friends…that is, as long as you are not going to class, someone else can use your pass – pretty sweet 🙂