The funny thing is, once you are reasonable dancers as a couple, it's hard to continue being mad while dancing. You might be upset before, you might be bothered after, but you have to work to be mad during the dance. Few couples can pull that off, and even fewer have the desire to.
There just is something about a good dance that takes the steam out of most couple fights. It may not last all night, but the edges are softer after a great dance. It's like watching kittens or puppies playing; they have so much fun and they are so cute, you have to laugh at 'em.
Part of the reason is we learn to pretend we are happy while dancing with others. Ladies smile at guys during a dance when they would run the other way if they saw them on the street. The better leads protect their partners from harm (other dancers), and pretend they love their partner who is struggling with a basic CBL. It's part of the culture to put your best face on during the dance.
As you become a more seasoned dancer, it's tough to turn that off just because your S.O. deserves to sleep alone for the next two months. Remaining totally bent out of shape after a decent dance is difficult, even if she considered committing justifiable homicide on you a few hours ago.
The Big Exception
The fastest way to have your partner more upset is to help them with "corrections" or "suggestions" unless you are in a training/practice session and the mood is right. When is the mood right? Rarely! Sorry, but it's borderline never for many couples.
Unless you are pro dancers, you won the last "Dale Carnegie: How to Win Friends and Influence People" award, and training is your business, correcting your partner is a recipe for conflict. You better do it immediately after a great love-making session, a gourmet meal, and winning a few thousand at the poker table. Otherwise, skip it and find a coach/instructor that can deliver the corrections.
For some reason, most people don't want to hear it from their S.O. Most don't take it well, even when their S.O. is totally, absolutely, unquestionably right. And I'll take one for the team and let you know that the guys are the worst in this respect. In the vast majority of cases they'll shoot the messenger rather than listen to reasonable advise from their S.O.
The right frame of mind is dancing as if your S.O. were someone you wanted to date, and you need to impress them with your attitude.
Next time you're working out of fighting mode, dance a few tunes, but use the same skills you use while dancing with others, playing up strengths and ignoring weaknesses. It makes the evening better for most couples, even if you aren't totally over the fight. A smile or two takes the sting out of most of life's rough edges. It may not work after you've gone nuclear on each other, but for most disagreements, dancing is the perfect way to work yourself back into their good graces.
Even with all the fighting among adult cats, there still seem to be plenty of kittens around.