It's a similar experience on foot. One of my favorite local hangouts is in Wrigleyville. I almost never go there, because I won't go anywhere near Wrigleyville during baseball season, and in winter I'm in cocoon mode. That said, baseball season has enough game days to actually fuel a business.

Soldier Field is vaguely easier. It's still right in the middle of the city, but, being in a park, and not too far from the highway, game days don't really pose a challenge except when I've lost my mind and decided to drive to the aquarium instead of taking the train. On the other hand, I bet it's really awful for anyone whose regular routine forces them to use Lake Shore Drive or the spaghetti bowl.