Book-Loving Insomniacs?

Where can book-loving insomniacs (and those who work late/prefer to socialize past 9pm) go to comfortably enjoy a newly acquired gem and (possibly) also socialize with others?

A place that is relatively quiet, open until at least midnight and serves tea is optimal.

Does such a place exist?
Is there such a thing as a book club for night owls?

Please do not mention Starbucks, thank you.

How about Starbucks?

Seriously, though, that's a good question - what part of NY particularly?

DTUT on the Upper East Side; 2nd and 84th-ish. I haven't been by in a while, so make sure it's still open, but it might be worth checking out.

(#2, that was pretty funny)

Esperanto Cafe is where I go to read late into the night.

I'm as stumped as you are. New York is not Paris, you know.