We both forgot that the Bears were playing at Soldier Field, so we joined football fans (both of Chicago and San Francisco) on the train and during the walk to Museum Campus. Then we spent approximately the amount of time a football game lasts at the museum, visiting our favorite exhibits and checking out a new one, leaving just in time to see everyone again on their way out of the stadium (Bears fans were in surprisingly good moods, though that's probably because they were drunk and it was 50 degrees on a late afternoon in December.)
Due to that relatively gorgeous weather, we decided against joining the crowds and instead walked along Lake Shore Drive and through Grant Park, taking the long way back to the Blue Line. It was quiet near Buckinham Fountain, turned off for the season. The sky varied from shades of blue to white while the sunset turned the buildings of the skyline a warm red.
We'll join in on the hustle and bustle of the season eventually, but until then, we're okay with doing our own thing away from the noise.