Dancing.

Sureeee, why not? Gilderoy must have been an amazing dancer back in his days, Treyen could give it a go. Though, he knew little of dancing, but he DID know that there was music involved.

There we go. It had music, it couldn't be wrong, right?

He walked inside, sporting a wide smile, and...why was the Flying Professor here? "Hello sir!" he said, and, well, stood there, inside, doing nothing, just waiting. Yeah.