Rockerfeller Center has a lot of international-themed buildings and elements. Check this out - http://www.museumplanet.com/tour.php/nyc��I am pretty sure you can have some sort of tour where these are pointed out to your group. And then you can have a lunch at one of the many restaurants there.How does this sound?
How about the International House Of Pancakes? There s one on Livingston St. in Brooklyn!! ;-)