He glances back too, and lets his smile spread.

'You could show her the true meaning of Mardi Gras while you're at it, kid,' he says, and tucks the fifty into the boy's top pocket.

'I'm going to love you and leave you, darling. My own hot piece of ass will be getting thirsty, and not in the fun kind of way.'

He straightens up, and nabs Sherlock's drink. He's got a whole lot more trouble to cause tonight.

'Try to enjoy yourself, yes? And don't get killed, the bar'll be even more boring if you can't manage to keep yourself alive.'