That isn't a canteen. Like the article says, the closest thing we have in the US is the Ikea food court. You collect various foods on a tray and pay at the end. It's more customizable than restaurants where you order a main entree. Canteens have variety, apps/mains/sides/desserts, that you can pick at will, and are semi-self service.

Canteens (stolavaya) are alive and well in Russia, and were my favorite places to eat because of the variety and thrift.

Here's how one is arranged: https://i.ytimg.com/vi/Ml0F97OZu6k/maxresdefault.jpg

Here's what your tray might look like at the end: https://media-cdn.tripadvisor.com/media/photo-s/0c/46/f7/cc/...

That looks like a cafeteria style restaurant. We have lots of those. e.g. Boston Market:

https://www.prlog.org/10985847-wwwbostonmarketcom.jpg

Or the inside of most any Whole Foods or other upscale grocer.

A food court is different. There are a bunch of vendors surrounding a common eating area. Sadly because it’s America, it’s the same 10 fast food or fast food like vendors in every food court, mostly. You might see more variety in an airport.

Kind of like Picadilly's Restaurant?

https://4.bp.blogspot.com/-IYKR9N0VneA/UZ96KquXbYI/AAAAAAAAD...

https://s3-media2.fl.yelpcdn.com/bphoto/b3jONzG2-_wI804mxVBX...

You might be surprised at how close you can get to that experience at a nicer grocery store/coop (most larger Whole Foods are this way, for instance). The salads and sandwiches can be put into a plastic container or just on a plate and there’s seating (my favorite grocery store even has outlets).