Tavern (Mordor)

The Tavern is the structure that is used by Mordor for recruiting the Corsairs of Umbar, until Rise of the Witch-king, in which game the Corsairs are summoned from the Haradrim Palace instead. Before that though, the Tavern was also used for soldier upgrades, which became a purpose of the Great Siege Works in RotWK.

The Isengard Clan Steading in RotWK has the exact same appearance.