[Pentegarn]

I went to one, but it has been almost 20 years. I will tell you what I remember of them.

Like any play, it is divided into short acts. The guests are treated as detectives being served dinner by the suspects. Because the players in the mystery dinner theater are also the wait staff, while they serve you you can ask them questions about the murder which they will answer. That, coupled with the clues they give during the scenes should give you the clues you need. Each table then makes an accusation and the winners got free desert. (that sort of reward system may vary with the people doing it though)