Ok I'll play, even though I don't completely understand the rules entirely yet... or maybe I do.

If the barkeep allows only one person into the bar, and that person happens to be a werewolf, I take it that the cost of his mass-murdering of all the townsfolks in there would be outing himself as obviously a werewolf?

Also I nominated meself for the noble position of factorum della citta. I mean barkeep. I don't care how absurd my auto-nomination is.