Charlie's Frog Pond is a Park Avenue Tradition. A diner with a different twist. The frittas are out of this world. Fresh ingredients, good service. It's a little small, so you might have to wait for a table.
It's also a very popular place on Sunday mornings to meet with your friends and nurse a hangover, or peruse the New York Times. So, get there early. Even if you have to wait a little while, the Park Avenue Ambiance will keep you occupied. Just people watch. Mostly a breakfast and lunch place.