So please don't attack me here, I am sincerely asking for feedback because we've never had this happen before.
We have a gentleman from another country (we know what country but I don't think its necessarily relevant here), who always tips less than 10%. We have other customers from the same country of origin who also tip less than 10%, but they aren't regulars like this guy. So among this specific nationality they are tipping consistently.
None of my servers want to serve him because he's taking potential tips away from tables that pay better. We know that its not that he thinks the service or food isn't good - he always glows, but he's always right around 9%.
Tonight my lead server asked if we can turn him away and say we're sold out (we very often often are). I told her to let me think about it. My gut says no. It doesn't feel professional or an appropriate response. But we know that he will never tip higher. My reminder to my server that this is a cultural difference is falling on deaf ears. I have the right to refuse service, but it also feels like racism although we would only be banning him not others. The more I type the more it sounds like a really, really, bad idea. But I turn it over to you...what do you think?