Guild Hall

A Guild Hall is a building historically used by guilds for meetings. In-game it's an instanced room for a guild. Currently this feature does not exist in World of Warcraft, but may be implemented in the future.

The Explorers' Guild meets in a huge guildhall called the Explorers' Guildhall which is located in Ironforge.

"Smaller guildhalls...are being established in far-flung corners of Azeroth, usually in the back rooms of inns or taverns along well-traveled routes to distant parts of the continent."