I hate hearing "I'm not racist or anything, but," it's used as a way to not offend anyone by making a racial comment. If I said, "I'm not racist, but towelheads make great taxi drivers," if would still be a racial comment. In the situation of cards, I use black kings because I don't want to use the red ones now. I'll use those later. Whatever you have to say, leave race out of it because, eventually, someone will get offended.
Why on earth would you want to inject race and affirmative action into your performance in the first place?
I thought vlaraway's post was about what he would do if a spectator raised the issue.
My Martin Luther King reference was suggested as a response. In other words, you are proud to have the Kings represent Martin Luther King. It was not tongue in cheek.
Having stated that, anyone who has ever seen a pack of cards realizes that there are black and red kings, so how would using the black kings imply that you are a racist?
When you make reference to a subject like race out of the blue, your motives will be suspect.