Shit. Well, really, he had nothing to lose. If he lost, he'd gain a better place to live and since Sirius lived at Hogwarts a good deal of the year, he'd still have a quiet workspace. If he won, he'd be left alone, and that's all he really wanted in the first place.
"You're on," he accepted, dealing out a new hand.
Three of a kind! Hah. His pride would be intact and Sirius would leave him the hell alone. He took a swig of his Scotch and declared "Two. Hit me."
He took two cards from the pile. Still three of a kind. It was looking good.