JZ71 says:

First, duh! Second, the office work environment is one where one is less likely to experience overt racial discrimination, both because there are many avenues for recourse, if it does occur, and because you get to know your coworkers on a personal level – you may dislike them for other reasons, but it’s rarely just for their ethnicity. Where you’re more likely to experience or witness discrimination (if you’re paying attention) is in random daily interactions with people you don’t know. Anonymity provides a certain amount of “cover” and all we each have to go on are our previous experiences with people that look, speak and act a certain way. It may not be “fair” or PC, but it is an innate, inherent self-preservation trait of most human beings, and one that takes a lot of work to get past. But the real challenge has less to do with direct experience and more to do with learned behavior, with stereotypes. We learned our parents’ and our friends’ prejudices, we see the world through the media’s filters. Groups get labelled and stereotyped, fairly and unfairly. The best that we can all hope for is that we’ll treat and respect everyone as individuals, and that they’ll do the same for each of us.