Oliver wasn't certain just what Tom was putting in the holiday drinks this year, but whatever was in his had packed quite a punch. It'd taken him several songs of hard dancing, followed by litres of water, to clear the majority of the fog from his brain. Now he was left with nothing but a slight, happy buzzing in his brain which was just as he liked it.
He was just considering chasing down his last bit of water with another pint when he caught sight of a very familiar punk rocker on the dancefloor. He remembered his brother pointing Harry out earlier and a smile grew at the corner of his mouth when he realised that Harry most likely wouldn't recognise him.
With no more plan than that, Oliver walked up behind the now-dancing Harry and slipped a hand around his waist, leaning down towards his ear as he did so. "Can I cut in?"