I'm using these IFAQs to make me do my homework (read: game-world prep). Things like: so, where in Karrnath is Atur? Answer: east of Korth, just follow the road or take the lightning rail, it's the next city over.
The general description of Atur has me put in mind an unusually smart and chatty skeleton running a bar that PCs might visit. Probably they're not the owner, just the barskeleton, but it'd give the place some sense of self that wasn't just rooted in dour and militant Karrnath.