In the Bar in BRD I know there are a number of ways to get the door open, do the quest for the waitress, place the darkiron beer on the floor and let the patrons drink it until they become hostile and once they are all dead fire elemental guards come after a few minutes and open the door. I seem to remember a way where a dwarf patron got angry and breaks the tap off a keg and the spewing beer blows the door off, this makes the stone elemental hostile and a boss with loot. Does anyone know how to do this? I don't think I've seen it done this way since vanilla so it maybe gone or perhaps I'm remembering it wrong, it has been awhile. I was trying to show a friend the other day and could not get it to work.