Starting guidance
Take a role of director. Choose a topic (depends on the group needs - if there is some current topic that group need to work on, or there is just a need to make an atmosphere to freely express yourself and release emotions) and explain your group what they can expect. If the "play" will be about some specific event, situation , about some specific personas etc..
On your preference, choose from following topics and be creative with them:
1. Apocalypse - The world is ending. Without making plans forward, during the game players will develop how an apocalypse can look like. What will be the atmosphere, if someone will survive and how, what is the cause of it and what are the outcomes.
2. Corporate dramas - Just a casual day in a corporate company. Without speaking before game, let the players develop the atmosphere and look of this company, what does it sell or work with? What is the hierarchy? Who is who? What is the drama?
3. Creation of the world - Once upon a time, there was nothing and suddenly there was everything. Let the players imitate and develop this process during their play. Who is the creator? Is there even any? Where is it happening and how? What is the outcome? What is the process?
4. Crime scene - Something terrible hapend. There are police officers and...? Who is victim? What happend actualy? Is there some danger? What are the outcomes?
5. Family dinner - Casual dinner of non casual family. Let the players choose their roles and without telling anybody they have to express them during a "dinner". Is there any drama? Are there some secrets? What are the relationships?
6. Improvisation without the topic - Let the players develop a scene and topic during their improvisation .
7. Topic on your own preference
When you choose, start a little guided movement meditation to help people to get comfortable and relaxe. You can play ambient music, tell them to close eyes and move how they feel. You can navigate them to specific movements, as for example imitation of some animals, imitation of water/fire/air etc.
You can also add some icebreaker if needed.
And at the end of starting guidance, make 5 minutes mindfulness relaxation meditation to calm down before the play.