burger restaurant, starts with "Z"

[sarah.j.morrison]

I just saw the movie "the Girlfriend experience" and they featured/mentioned a bunch of great restaurants - Blue Hill, Balthazar, Craft Steak - and they went to a placed called: "Z_____ burgers". Can anyone fill in the blank for me?
Much appreciated!

[demigodh]

it is Zaitzeff.

and as an aside, that movie was terrible

[jinglejangle]

Zip?

[JungMann]

Was it Zaitzeff? The restaurant isn't exactly in a league with Balthazar and Craft though quality-wise, they make a pretty good burger.