Escape rooms are live-action team-based games where players discover clues, solve puzzles, and accomplish tasks in one or more rooms in order to accomplish a specific goal (usually escaping from the room) in a limited amount of time.
I've been studying them since late 2014 and have recently released a white paper where I present the results of a survey of 175 escape room facilities around the world.
Nicholson, S. (2015). Peeking behind the locked door: A survey of escape room facilities. White Paper available at http://scottnicholson.com/pubs/erfacwhite.pdf