Lots of speaking and listening, visual as well as auditory, easy reference point for lots of students (and teachers!).
Depends what chat show you want to mimic
How it works:
Teacher is the host with students as different characters discussing a topic. Audience asks questions, gets involved in the discussion, peer assesses and so on. Could be Newsnight, Opah, Parkinson, Montel –style etc. Panel show, family feud, revelations, question time etc.
Really easy to use and gets students into a topic.