But when the Israelites danced in Ex. 32 in worship before the golden calf this brought God's wrath. It was a dance of sensuality. The modern dance is overtly sexual. The steps and gyrations practiced on the most dance floors are obviously intended to focus attention on sensuality. Men and women rarely dance for physical recreation.
People dance because it is fun and stimulating.
She appealed to his lust and that is what most of the modern dancing is designed to do. While God does not condemn the general movement of the body to music, He is clear in His condemnation of lust, lasciviousness, and sensuality. We need to deal honestly with this issue. School dances aren't innocent affairs just because they are chaperoned. Our world is drowning in sensuality.