I learned about the "walking school bus" concept from an article I stumbled over while researching bike commuting for a paper at gave at an Anthropology conference. I've been walking my kids to school ever since that, and a couple times a week two other kids join us. I didn't expect it be, but it's really my favorite part of my day.
Could it be extended to walking meetings among office colleagues? Or classes of students? Tough to take notes while walking, but I give a campus tour every time I teach Urban Sociology, and we pause do for note-taking.