The closest I've got to being angry on a dancefloor:
1) A relatively recent encounter at a social dance with a "cougar" who had to have been on some kind of drugs (and reeked of major cigarettes to boot), grabs me for a waltz and then just FULL FORCE, thrusts herself up against me the whole time and asks me a bunch of rather inappropriate personal questions, that $#%@ song couldn't end fast enough for me. EEEK!
2) Long time ago, up in Boston, trying to dance with some women who mercilessly criticize you and question your every move. It wasn't a constant occurrence, but it was not fun. For example, I had the misfortune of attempting to dance with this one woman who wasn't getting asked the whole night, hardly at all, in about 10 seconds it was very obvious why, what a word that rhymes with witch!
3) Another night, Boston MA different venue, it was just one weird night where I felt very unwelcome and just invisible, I hardly danced the whole night, I never met such a small but incredibly snooty crowd. I was just about to leave with some diginity intact and just on some odd whim, I asked the woman who was at the front desk to dance, she not only happily accepted, but she was such a delight to dance with, AFAIC, she was far better than ANYBODY in the room that night in all aspects.
And just to clarify, those experiences I had in Boston were NOT the norm, nearly every time I danced somewher there I had a BLAST, the EC swing community up ther is esepcially friendly from what I recall.