Sirius chuckled, and gave Gaius his most put upon look. "Have I ever smoked in the house?" he asked in an injured tone, implying that it had never happened. That was at least true since Harry got back, and there was no way for Gaius to know about the times before that. He blew a showy smoke ring, and then stubbed his out as well. "And I don't recall you insisting on breath charms in the Snape graveyard. Though I suppose that would have been too presumptuous," he said, giving Gaius a wink, and lifting his pint. "Let me have another swallow or two of this, and then I'll oblige you."