I don't think I have ever had croquettes in the US.
In the area of Germany where I come from, croquettes are a (sit-down) restaurant side dish that has equal status to french fries. As the images below show, Germans eat croquettes with a gravy sauce. (Note that we do the same thing with french fries. Also note that the German gravy is not as thick as the gravy I am used to in the American south.)
|Picture from http://www.bavariankitchen.com/sides/kroketten.aspx|