I don't know it very well but I remember hearing it a while ago. It seems to be an older one. It's about this guy who sees his girlfriend in a bar with another guy and she's all dressed up in a sexy red dress or something and the guy says it can't be his girl because she doesn't dance? Any help?

If you could provide even some lyrics to the song, it would help in being able to provide an answer.

I believe this is the song you mean.

Mark McGuinn - She Doesn't Dance Lyrics (http://www.cowboylyrics.com/lyrics/mark-mcguinn/she-doesnt-dance-6927.html)