"I'm at work." Aziraphale protested. "Someone could see..."

Who could see. They were off to the side, in the office, and no one could see. His colleague was working the desk, the storytime session was going and no one really needed him. He wanted to protest but there was music and a boy was asking him to dance and--

He took his hand without thinking, not sure what to do. He hadn't danced in years. Not with a boy either. Did he lead or follow? Was it a waltz? He could not stand on his feet or he would ruin everything!!