I was at the Apple Store in Chicago right before Christmas (when the weather outside was in the negatives with wind chill) and was shocked to see the doors wide open. As I walked in, I was greeted with a warm blast of heated air. Typically in cold weather environments buildings use revolving or double doors to lower the heat consumption, I was wondering if anyone knows why Apple chooses not to do this, especially in light of their effort to be more environmentally friendly? Perhaps the Chicago store is the exception. Does anyone else see wide open doors on cold days at their Apple Store (or for that matter wide open doors on particularly hot days with the AC running full blast)? I'm not sure if this post should go in this group or in the community discussion, so sorry for any mis-posting.