I remeber being in NY, my step brotehr got turned away from a medical centre as he had a type of medical insurance that the centre did not accept. He was only 5 and it was in the early hours of the morning. What was that all about?
Well, I wasn't there, but there are medical centers (which conjure up an idea of something less than an emergency) and then there are emergency rooms (anything from small injuries, broken bones, to life threatening injuries)...and they are 2 different things depending on how you look at it.
I wouldn't expect to be turned away at an emergency room (found in a hospital) if I didn't have insurance.
I would expect that a medical center (clinic or urgent care center) would get pissy if I tried to pull that on them. Although, if I was laying there on their floor having a heart attack, I doubt they would stop and ask for my insurance card. They would probably just get pissy after they saved my life.
I believe that there is a misconception that since the US doesn't have universal health care that people in emergency situations can't get help if they can't pay for it. That isn't true. Ask any illegal immagrant what happened when they went to an emergengy room to have their baby born even though they didn't have insurance. Well, they got their baby delivered, that's what happened. It is ongoing treatment or non-emergency treatment that is the real issue. And if you are poor enough, or can work the system enough, you can get ongoing care. We have community clinics (and I have used them myself when I qualified based on my income). I didn't like it because the facilities weren't all that nice, and the doctors didn't give quite as good of care as I would have gotten if I could have paid for it at another facility (this is due to the quantity of patients, not because the doctors didn't care). But I did get rudimentary healthcare and I don't think that I got short changed all that much (it was very low cost, after all).
In the US, it is the lower middle class that are really pinched the worst. Sometimes they make just enough money to not qualify for assistance programs, but not enough money to comfortably afford insurance. That is a hard situation to be in (been there done that myself).
As far as fish 'n chips...Long John Silvers is the closest thing, but they really don't have the same sort of "grab it and go" kind of feel.