I choose whole class or small group depending upon my goal for the activity, how much time I want to spend and how in depth I want to go. It is successful and well received both ways.
Students needed to give me a thorough picture and each student needed to tell me who or what they were and an additional piece of information having to do with why they are in the scene. I am pretty strict about them staying in the target language. This is a re-tell and we have thoroughly discussed the story or chapter, vocabulary has been front-loaded and reviewed extensively throughout and in many cases posted on the board. They are not allowed to be someone or something that they cannot identify and give a detail about in the target language.
This is just a great opportunity for fun, movement and interaction with a story or text.