From the very origin of the world 'lunch' itself (I'm such a word nerd) to establishment of the 'lunch hour,' yes, THE lunch hour, to inventing metal hot dog carts, NYC was at the head of it all.
It's a great display and well worth a visit. Also, did I mention it's free? Who doesn't love free?? Go here for more info on the exhibit, which runs through February 2013..
Lunch Hour NYCFollow @Lkpnyc
New York Public Library's Steven A. Schwarzman Building (Entrance at Fifth Avenue & 42nd Street)