Research reveals most popular fast-food chains in America Market research ... that can certainly extend to the realm of fast ...

In Portugal, for example, you can order a draft beer in a bakery. But in the U.S., strict liquor laws and pricey licenses keep fast-food spots mostly dry. But some chains found a way around the ...

Narrator: With more than 42,000 restaurants in over 100 countries, Subway has the most locations of any fast-food chain on the planet. And at first, that sounds like a sign of a thriving sub giant.