No. 5: New Orleans, La.The Big Easy's fragrant, eau de Post-Party Frat Basement scent doesn't help matters. It's also a very sweaty city, with high temperatures and humidity year-round. And it's a smoker's paradise -- the state tax on cigarettes is low, and the public smoking ban doesn't extend to bars. About 20 percent of adults in this city smoke.
SEE NEXT PAGE: No. 4: Chicago, Ill.