Oh yes, it is definitely a thing - and really only a jewish thing that I know of. I grew up in the mid-atlantic, but it is definitely also a thing in NYC.
That is fascinating, thanks for sharing it. I hadn't heard of it, but then again, I don't have any interaction (that I am aware of, at least) with Jews -- everyone in my circle is a Christian or impersonates one.
https://en.wikipedia.org/wiki/Jewish_American_Chinese_restau...