In my case it was a manager who was slightly derogatory about the Indian division in the company. "That annoying uncle who tends to say the wrong thing" type. He stopped the comments afterwards and I do count that as "it works": others witnessed it was not ok, and new hires won't see this behaviour normalised in the future. Even if his internal view hasn't changed, it was progress and was worth the uncomfortable moment.
Even if it doesn’t entirely “work” for that one person it is still important to address the culture issue immediately and publicly, because it sets norms for everyone else in the room. Even if you are the only other one in the room. Perhaps especially if you are the only other one in the room.
