The mess now is called a "dining facility" or "Dining Facilities Administration Center" (DFAC). The Officers' Club ("O Club") is an outgrowth comparable to the Officers' Open Mess, but also providing areas to allow officers to entertain guests. A similar version for enlisted personnel is the "E Club". "Mess" also describes the formal affair of having a "dining in", held for military members and closed to the public, or a "dining out", a social event for military personnel and their families.