Worst city you've been to...?

[Kitsune]

I had the pleasure of dealing with some sales goons at the office over the past couple weeks and, since they travel so much, the conversation always seemed to drift to their experiences around the country and what cities they enjoyed the most with the seemingly most important factors being weather, traffic, and food. For fun, I inquired what the worst city they had ever been to was.

"New Jersey."
"New Jersey's not a city."
"Any city in New Jersey."

The other seasoned traveler agreed, leaving me rather surprised that neither of them said "Detroit". Many years ago, I would have answered "Pittsburgh", but I've heard that place is no longer as I remember it and the stink of sulfur from the mills is pretty much gone. It'd probably come down to any of the dozen tiny towns I've passed through on the highway that no one will know.

So, what is the most unpleasant city you've been to and why?