In Greece, there are Applebees (so ScottC can't be right when he says that all European Applebees have closed! ), Ruby Tuesday, TGIF, and Bennigans, all of which would qualify as "American cuisine". They're popular with a lot of people in the 16-21 age range, but range from the awful (Bennigans) to the decent-but-too-expensive-for-what-it-is (TGIF), hence I never visit them...
Most of the patrons seem to go there for the fact that both the customers and waiters are in the same age group as themselves (and the youth/inexperience/poor training of some waiters really does show)