I came to a conclusion while watching this clip from an old Soul Train episode: The 1970s was undoubtedly a more homophobic age, but if guys today danced they way the do in the video below, folks would label them as "gay" for sure.
That's not to say that all of the Soul Train dancers were straight. But, ultimately, the times didn't demand that people be so damned butch on the dance floor.
So, next time you see someone getting down at Suite or Dharma Lounge or Halo, don't assume and don't judge. Just have fun.