Drunau is where the Stromkirk vampires under their progenitor, Runo, have established their ancestral manor and their center of commerce outside of Stensia. If it is blood you want, Drunau is the place to get it. Humans who possess especially delicious blood are treated like the most precious livestock, knowing a life of pampered bondage but being protected from all the other dangers of Innistrad. All this takes place within the elegant ballrooms and mahogany studies of Stromkirk manors.
In Nephalia, when vampires must walk among humans, they use glamers to disguise themselves so as not to drive away their human neighbors. Occasionally, a newly sired vampire leaves the family fold of civilized decorum and goes on a blood-soaked frenzy of feeding. Often the Stromkirk deal with this as swiftly and as quietly as possible, especially if the vampire is a rogue from outside of the bloodline.
The Fauchard are not cathars, but are a distinct order of human vampire hunters. Some have come to Drunau especially to destroy the undead and possibly Runo himself. They are a secretive group that recognizes one another through an elaborate, symbolic code, either worn, written, or gestured. Runo knows of them and tolerates them to some degree, as the Fauchard destroy the vampires whom the Stromkirk consider to be most crass and distasteful. That said, the Stromkirk vampires will relentlessly pursue and destroy any Fauchard who becomes known to them.
The metzalar (merchants) here deal in the usual fare of ships, handcrafted goods, wares from other provinces (such as holy items from Thraben), and weapons.