What is another word for ante-room?
Pronunciation: [ˈantiːɹˈuːm] (IPA) 
Ante-room, also known as antechamber is a waiting area or reception room which leads to a larger, important room. There are various synonyms for the word "ante-room" such as waiting room, vestibule, foyer, reception area, entrance hall, lobby, entranceway, and anteroom. Waiting rooms are typically found in places of business, offices, and hospitals whereas reception areas are generally found in hotels and event venues. An entrance hall is a room in a house where guests are welcomed and can wait before entering the main living area. The word "lobby" is used to describe the entrance hall of a building, such as a theatre or cinema.
