Repp5, I want to say Cals is by Wells and Van Buren. There is also a place called Handlebar near North Ave and Western that is supposed to be for bikers. I haven't been there though.
Dumpstervegan, if I haven't seen you in passing I probably will soon enough. I will usually talk to other fixed gear riders or at least say hello if there is the oppurtunity. Though it is a little strange to be like, "Hey aren't you the guy from the internet??" so who knows..
-Jason