Just to put your question into a perspective.
2 Sam. 6:14
And David danced before the LORD with all his might; and David was girded with a linen ephod.
I know, that is not what your asking about but, he was dancing.
Something like Ballet is performing being considered to be part of the arts.
Whereas, poll dancing is just exhibitionism with a totally different purpose in mind.
As far as someone dancing with someone who is not their spouse, then you begin to get into the realm of Legalism.
Keep in mind.
1 Cor. 10:23
All things are lawful for me, but all things are not expedient:
This means, does it profit you, does it lift you up Mentally, Emotionally, Spiritually.
all things are lawful for me, but all things edify not.
This means, does it profit you, does it build you up Mentally, Emotionally, Spiritually will you derive any benefit from doing it, is it enjoyable?
I know what I have said can be misconstrued by some people to mean all sorts of things, but I have answered your question in the spirit with which you asked it.
(Edited out)
Don't worry about it, don't put that burden on yourself, you will not go to Hell if you dance.
Rom. 14:8
For whether we live, we live unto the Lord; and whether we die, we die unto the Lord: whether we live therefore, or die, we are the Lord's.
Rom. 8:16
The Spirit itself beareth witness with our spirit, that we are the children of God:
Be Blessed in Christ.