Non-Hispanic white Americans are not native to the US, and I don't see a reasonable basis for concluding that non-Hispanic white culture should be the "native" or "default" culture in the US.
Sure, it might be the dominant culture — but there are other subcultures like Black or Hispanic cultures that are pretty strong 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 not, then why are you singling out Indians?