I'm one of the "voyeurs" and I look nicer then Ronald (everyone does!)
I don't visit these restaurants much but there's nothing like McDonald's, ei. going to a McDonald's in a foreign country - even though those around you may be speaking in a foreign language, there is something distinctive about McDonalds' architecture, Ronald McDonald is ever-present, and you can always get a Big Mac...
McDonald's Architecture (mostly "interior architecture") is unique, and everytime more "high-tech" using metal, glass and flexible light elements but always with very direct and silly adaptations to the sites. I have a friend who design's McDonald's restaurants in Portugal and, belive me, there's no much space for the architect's imagination...standarization and the company's brand are always first! he gave me this link where you can see an amazing egyptian restaurant: http://www.bsu.edu/World2000/research/owens/bp3.html
go here to visit some of the fantastic original red and white tiled restaurants buildings:
by the way, in Portugal free-smoke Mcdonald's didn't work... Did the same happend there?