Well if stuff that has "zombie" in the name is Halloween-appropriate, put on "Zombie" by Fela Kuti. I mean, sure, it's not so much a Halloween song as it is a scathing criticism of the Nigerian army from the 1970s, but (A) it's fucking awesome, (B) you can't not dance to it, and (C) it'll use up a good twelve minutes of your radio slot.