Good luck finding someone, whether they admit that they like it or not, who won't run out onto the dance floor the moment it comes on at the next wedding reception. Especially if they've got a couple of drinks in them.
I'm not sure that more needs to be said. It's probably a good candidate for my "transcendent badness" category - there are points in the song that are so awful that it's embarrassing, and yet it's so damn catchy that it's hard to resist.
Wild Cherry, "Play That Funky Music," from the summer of 1976.