Lettieri in Yorkville is the original.
John Lettieri opened it in the early 90s I think.
Now it's a franchise, and he also opened Hero Burger (the original also in Yorkville) years later, which is now also a franchise.
In any case, it's not the best food or the best service, but it's certianly not the worst. And besides, you go to Lettieri to people watch. And I mean, it's heavy there. Perched on the corner of Cumberland and Belair, the patio spans both streets, which makes it prime real estate for thoroughly judging all the Yorkville "hotties".