I’ve been keeping tabs of my travels and explorations, and compiled them into a rough map over at Google. Chicago MidCentury Architecture marks notable churches, neighborhoods, and a handful of individual buildings from the 1950s and 1960s.
Tracking MidCentury Architecture
A Chicago Sojourn 
The Mount Prospect YMCA is actually the Lattof YMCA in Des Plaines.You should consider going up and down Devon and Touhy. I believe these have the largest concentrations of midcentury in the area.Also a great resource for the North and Northwest suburbs has emerged at http://www.landmarksil.org/recentpastsurvey.htm
I actually travel Touhy all the time — it’s like a secret back door from Rogers Park to O’hare — and haven’t found all that much, certainly nothing to compare with Harlem Ave.Devon’s a little more interesting, but most of what I’ve found is on its cross-streets like Lincoln.And.. holy crap, thanks for the link! Awesome!!
I’;m looking to visit the city soon so your map will be a great piece to have with me to help me find the sights you’ve posted on. Great idea