There's an interesting (and quite plausible in my opinion but I admit I'm biased here) theory that the people in the dance hall were frozen by the time of the kiss and that original Jack was somewhat out of time for a moment. I'd rather buy that than the alternative and I don't care if that makes me a wimp. And there's historical precedent for men dancing together when there's a shortage of women - okay so I imagine that it wasn't questioned too closely if some guys seemed to like it more than others. But it is at least handwavable.

And I do admit, this ep? I'm willing to forgive a great deal.