There are three doors there that require a specific key and you get feedback like you would entering a room at an inn, I have not seen a drop or found a key to those 3 rooms, so not exactly sure if this is actually a bug or intentional.

I was in there the other day and came across one of them; the key did drop but it was a bit away from the door and to the right. I think it was the room in the southeast corner of the mini-map.

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Whomst've'll'd'mn't I play:
Salema Nefahri :: A penny for your thots
Zrae'a'stra'fryn :: That which nightmares are made of
Khasir :: From the East a storm is coming