I remember back when we were researching Pizza heavy, there was another linked restaurant or ping pong place in the Chicago Loop.  The connection may have come through the Dr Pong in Berlin, I don't remember exactly.  And then we have Loop Capital, mentioned by Q.    And right directly across the street from the U of Chicago Institute of Politics (huge power) lies a Chabad.  Not 50 feet away!    So Chicago plays an immense role in the DS.