I know exactly what you mean: my dad's previous workplace backed up to a coffee factory, so you could smell the stuff in the air every morning.Anywhere within a mile of the factory, the smell of chocolate is strong enough to give you a contact high.
Likewise, there's a stretch of road in one of our communities that's literally nothing but fast food restaurants (in fact, because this same community also houses a man-made duck pond, Judgemental Maps refers to this area are "Ducks n Burgers"): when the weather is cold, you can just smell the aroma of burgers, chicken sandwiches, tacos, and Arby's in the air.