RRB Cycles in Kenilworth, Illinois. Located in one of the poshest of north shore suburbs is Ron Boi's shop, locarted in an old farmhouse on Green Bay rd.. You can usually see some of his own frame creations along with a bunch of "stuff". Ron will talk your ear off too. And if you bring up rowing, you better plan on spending an entire day.
CycleSmithy in Chicago's Lincoln Park neighborhood is C&V heaven. Hanging from the ceiling is owner Mark Mattei's extensive collection. Great place to spend an hour gazing at a wide range of vintage bikes.