Cormac was dancing with Lavender and Katie on the dance floor. He would never say he was skilled at dancing, at least not this type. After many years of lessons, he was skilled in the formal art of dancing and how to slow dance and other formal dances properly in his youth. This was not formal. The song was upbeat and fun, letting them dance anyway they wanted. Or in his case, any way he dared to attempt.
But he'd been drinking and it was his best friend's party. Even if he could hold his liquor well enough, dancing and making a fool of himself was a small price to pay if it meant she was having a good time. If someone made fun of him now or later he'd just claim to have been drunk and not knowing what he was thinking. Though he wondered how she danced in her dress like that.