Customers don't necessarily drive to restaurants, they walk, bike, or take public transit. Most frequently they walk to whatever is nearby when they're hungry, in most functional cities.

I just had some American friends visit me in Taipei and now that they're back in the States they're telling me that if they want food they have to drive 20 minutes, so I understand the situation is different for most Americans, but the suggestion then seems to be the obvious ones: the USA should modernize its urban infrastructure.