Places which could have a lot more people bicycling or walking:
Local grocery stores. People drive to the grocery store even if it would be the same amount of time to walk or drive, because it's just what people do. (and there's a giant parking lot there).
Schools. Lots of parents queue up in line to pick up their kids from school, even though it would be FASTER to bicycle there with the kids and back home--this is because of the "walking/bicycling to school is scary/not safe" culture which has arose in the last 30 years.