The line between safe dancing and unsafe dancing is so thin, and so easily crossed, I think it's best for MOST Christians to refrain from dancing.
The line between the safe kind of sway, and the suggestive kind of body sway is so so so thin, why put yourself in that situation?
The line in hand to hand dancing, between a hand being put too high or too low, is so thin, why even go there?
The distance in hand to hand dancing between being comfortably close, and too close for comfort is so thin, why put yourself in that position?
It's not like secular music. Secular music has stark contrasts. You can listen to some Kenny G without easily falling into some Eminem. So a hard and fast rule against ALL secular music seems misguided. (Please don't derail into a debate on secular music. It's just a point of reference.)
I don't think you can say the same about dancing.
A safe body twist, or a safe body shake, can too easily become a suggestive body twist or shake. It's a very, very thin line.
In safe hand to hand slow dancing, the hand is literally inches away from places it shouldn't go. The distance between the two is so easily crossed.
For the sake of avoiding temptation, lust, and all things inappropriate, I really think it's best to avoid it.
I know my answer is going to offend some, and you may view it as suggesting you're not holy enough or whatever. That's not really my intent. I'm not suggesting anyone is a tempter/temptress. I know some reading this will fill their mind with outrage and assert I'm drawing some distinction between the holy non-dancers, and the sinful dancers. Yup, I know how some people think. I'm not declaring myself as way up here, as those who dance are on some unholy level. Not declaring a special holy club, etc...etc..etc.
In my opinion, the only Christians who should be dancing are engaged or married couples. (No I'm not speaking against dance during worship services. Two different topics here, so save that rant too.)