As someone in the US, this rarely occurs but if it does it is usually when a place serves a large group (justified as the Extra difficult for serving so many people at once). If I saw this applied in another situation I would 100% consider that a tip, give them nothing, and never eat there again. If it was applied when I went in a large group I’d say it cam go both ways, but I’d definitely not go back there with lots of people again. Overall, I’d say it’s bullshit and a good proportion of the people I know would agree.

Hope your trip goes well