Once upon a time, before Uber, before cell phones, and before the Internet, people used to walk places. At least that's what we hear. As a city-dweller who doesn't own (and can't drive) a car, and someone who is perpetually late , I've taken my fair share of stressed-out Ubers. But I draw the line at any trip that I could walk, train, or bus in less than 20 minutes. The thing is, there are plenty of people in this city with lots more money than me, and they seem to have forgotten how to walk or…