Thank you all for your suggestions in my original post (http://chowhound.chow.com/topics/693279) especially the cocktail lounges - we're going to be very drunk!!!
Having a look at the restaurants suggested (Gramercy, EMP, River Cafe) I think I need to downgrade slightly (my girlfriend isn't as much of a food snob as me!). My requirements are modern american cuisine, relaxed environment, casual dress (shoes, but jeans allowed) and priced at $200ish all in.
Can any reccomend good mexican, burger (shake shack?) and chinese cheap/reasonable eats?
Thanks very much Dan