But if I run outside, how am I supposed to watch TV?

But seriously, running outside (especially in urban areas like NY) can be a bit annoying when you consider the number of intersections you'll need to cross. On the other hand, if it's a less populated area, outside is usually the way to go. One of my most memorable runs was in Tallinn, Estonia at 4am during the summer. It was completely bright outside, and Old Town was deserted aside from some late party-goers.