Question: What is the space between two sets of doors called?
Disambiguated questions and answers: question: What is the space between two sets of doors called in reference to access control?
What is the space between two sets of doors called in reference to architecture?
answer: air lock
sally port
access control vestibule
mantrap
arctic entry
vestibule
Natural Questions answer: vestibules (from the Wikipedia article "Vestibule (architecture)")