We examine how a public interactive display in the lobby of an undergraduate residence hall engages residents and contributes to a sense of belonging. The display projects questions onto a wall and users indicate their answer with a body action, which is read by a Kinect. The responses are aggregated and displayed in real-time. We describe our design process and the results of a preliminary field trial examining how the system affects students' perceptions of a shared geographic place and provides the opportunities for them to learn more about their hall's community.