I don't think you did anything wrong by not dancing with her, although I don't know that she did anything wrong either. In your initial post, it sounded like you don't like women asking you to dance, but that was corrected in a subsequent post. Clearly something she did bothered you, especially if it was still effecting you one half hour later. I'm just not sure that I really understand what it was. In any case, no one is under any obligation to dance with someone that they don't want to dance with.