I'll say Charlotte, NC. Mostly because it has absolutely no identity or charm, is horribly unfriendly to pedestrians, and it lacks any serious culture. Sure we've got some half-baked science museum geared towards children and the Mint Museum of Art. The Mint is an awesome building, but for an art museum, their collection sucks. I can only look at so much Carolinian pottery.
Walk? Why the hell would you want to do that? You've got a car that works just fine! The city has communities in the heart of town with no sidewalks (I live in one) and they budget $5mil per year which builds approximately 10 miles of sidewalk per year. 1800 miles to go, so only 180 more years.