If you need to go the store or to the post office or anywhere else nearby and you're in good health,
That's it. :) I've had so much fun lately walking (and jogging) within about a 3 mile radius of my house because everything is here - the boys' schools, every grocery store I need, the post office, the library, the park. And so what if I'm in my workout clothes all day? I'd trade fitness and wonderful workout endorphins for makeup any day!
One little sub-tip: While you're driving around, pay attention to which major roads have sidewalks. You'd be surprised how out of the way you may have to walk if there is no sidewalk.