Salsa is different. Even dancers who are in relationships or married dance with other people. It's boring to them if you only dance with one person. I hope I don't have to repeat that too oftenWomen treat dancing like a mating signal and the fact you went ahead and danced with another girl in her mind it was an indication that you were trying to mate with another.
I know.. bird brain logic.
try and get her to come out again.. relaxed and chilled place and see how she is with you.

So here's the thang, fellas. At a salsa dance event, it's good for a guy to dance with multiple partners to show that he's not putting one chick on a pedestal.
But obviously the usual game doesn't work on her, so I'm just going to do the opposite of my game from now on with her. Fun challenge