Hence the quotation marks: "native" - you're just derailing a legitimate line of reasoning.
> I don't see a reasonable basis for concluding that European-American culture should be the "native" or "default" culture in the US
Like it or not, it is the dominant culture especially in professional environments. If you want to have a conversation about why that is the case, what else it could be, etc. thats fine! But it's not the kind of conversation I'm looking to have here.
> Would you feel comfortable asking how to stop a group of Black coworkers from going to a restaurant that serves Black cuisine, or Hispanic coworkers from going to the local taqueria?
If they are doing it to the detriment of the overall business yes! - the line of reasoning follows for a predominantly Black business that is having a White enclave forming. Or a Hispanic cultured business with a Slavic enclave forming. Even more importantly a multicultural environment which is having 1 group overtake it. It's fundamentally a job of business leaders to set the tone and direction of company culture - and this is one aspect of it.