When I used to work in CC Philly, there were so many good options for lunch. I guess I wouldn't call them fast food, but lots of take-out/delis/restaurants/etc. within walking distance. I ate lunch out everyday and the wife and I went out to dinner at least 2-3 times a week, but we lived in the city and walking to a restaurant was more convenient than grocery shopping.
Now that I work from home, I never eat lunch out and grocery shopping is much more convenient when you don't live in the city. We cook at home and eat dinner out maybe once a week. However, the food out here is NO WHERE as good as it was in Philly, so I don't have the urge to eat out as much.