You'll need 4+ people, you split the people in to half or thirds, send them each into 2/3 different rooms. Once this is sorted, come up with a short movie. Each team has 5-10 minutes to practice. They then perform their movies in front of each other. Keep swapping people in the teams, and make sure the groups change rooms. Keep making movies until it gets boring! Make sure your movie has a theme, so you are not doing loads of different things!!! ENJOY.