What’s the best way to treat homeless alcoholics? Give them a place to live with a concierge who runs out and buys them beer or vodka every time they teeter towards the brink of sobriety? Most people would not call that a great idea. Except for Bevan Dufty, and his colleagues, who think it is. Dufty is a former San Francisco Supervisor, and is now Director of HOPE (Housing Opportunity, Partnerships and Engagement) for the City and County of San Francisco.