What is New York's Best Old Restaurant?

[The dining room at Keens, a very old restaurant that still serves killer food; Krieger]

In an Open Thread from a few weeks ago, we talked about the beloved lost restaurants of New York — those gems both big and small that diners miss the most. Today, we'd like to hear about the great old establishments that are still around today.

Decor is of course one factor, but what we really want to know about are the restaurants that still serve awesome food. And if you have a favorite dish or a favorite table, we'd love to hear about that too. So we put it to you, Eater readers: What is New York's best old restaurant? We'll cull the comments and the tipline to highlight the favorites on Monday.