Others have already said it, but to describe Amy's in one word: Standby.
This is the place that you go to have lunch when you're not really sure what you are in the mood for, when you don't have much to spend, or just want something relatively quickly and fresh.
The bar is also a great place when you just want to have a chill night of hanging out and getting your buzz on. Or even just a great place to start out a night of grander debauchery.
This place was such a "go to" joint for me that I actually had to make a conscious effort at times for it to not be the first place I suggest for lunch or drinks.
And the bar itself is just so improbable. The place is designed as a super-casual lunch spot with your standard fast food-esque tables and some gaudy pastel decor. But then there's a nice carved wood backbar off to one side. So things can seem a bit surreal when you first start drinking there.
Prices on everything are a bargain. And I seem to recall them having a really good long island, if you're into that kind of thing.