Our Smart Appliance Laboratory or short SmartLab is equipped with various actuators and sensors, like dimmable lamps, projectors and projection surfaces, cameras, microphones, localisation systems and others. It serves as a testbed for research on Ambient Intelligence and new ways of Human Computer Interaction. Different (meeting room) scenarios serve as use-cases for our experiments and the lab itself as hardware platform. Smart and proactive environments should support their users by providing automatic assistance functionality. This can be done by inferring the current user intentions from sensory input and by computing a suitable sequence of actions to support the resulting user goals. This helps the user to focus on his actual task instead of operating the installed devices.