I make it a point to always tip at least 20% unless the service/food is absolutely atrocious. If I'm not leaving a tip or leaving less than 20%, I usually explain why.
That said, a restaurant's service and food would have to be off the charts fantastic for me to return once I found out they had an automatic gratuity. If I knew beforehand that there was an automatic gratuity, it is unlikely I would even enter such a place.
I don't care for this idea at all.
Just my opinion though.
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