Maybe it's a fast meal at midday when there are still places to go, and a good meal in the evening to wind down.
I spent sometime in Lyon last summer, the cafes aren't too slow when you want to grab a bite to eat. However, I can only assume one would go to McDonald's to get a Royale with Cheese ;)
I love eating fast food in other countries. It's always different from home and that fascinates me.
Sure, I'm much more keen to enjoy 'proper' food from the country I'm visiting, but there's still a place for experiencing fast food.