Well, not tenn2005, but I'll give it a stab anyway. First, I'm not aware of any church this day that will flat stay that "dancing" is a sin, and you will go to hell if you "dance". And I'm not aware of what "type of dancing" you do...so it is hard to respond to that point. However the position of most religious groups regarding dancing is in regards to the type of "slow" dancing where a man's body is rubbing close to or against a woman's body. This activity can and most usually results in one or both becoming aroused and that can lead to impure thoughts or impure actions. (ie...sex) Now if the man and woman are married..then fine, there is no problem. But if they are not married...it just opens the door for improper activity. The real issue is...is this an activity in which a Christian should engage? And...if it can lead to impure thoughts or actions...should a Christian dance? I think that to be safe...the answer to both is no.
I have never seen anyone having sex on a dance floor. Full-body contact slow dancing is not 'dancing'. West Coast Swing, Hustle, Nightclub two-step, country 2-step, and ballroom and latin styles are real dancing.
Passing impure thoughts are no sins. If it goes beyond that to the point of dwelling on them or trying to see how one might act on them' is.