Just as a good architect knows how the to use the affordances and relationships of physical spaces to help cue behavior, architects of social software should aim to use software affordances to make socializing in the neighborhood, workplace, and commons as natural as possible. I think this will require cues to signal and differentiate as well as connect places. The goal should be to help people read context and act comfortably in different places whose norms they can quickly learn, understand and trust. As Harrison and Dourish write: "A conference hall and a theatre share many similar spatial features (such as lighting and orientation); and yet we rarely sing or dance when presenting conference papers, and to do so would be regarded as at least slightly odd (or would need to be explained). We wouldn't describe this behaviour as 'out of space'; but it would most certainly be 'out of place' and this feeling is so strong that we might try quite hard to interpret a song or a dance as part of a presentation, if faced with it suddenly. It is a sense of place, not space, which makes it appropriate to dance at a Grateful Dead concert, but not at a Cambridge college high table; to be naked in the bedroom, but not in the street; and to sit at our windows, peering out, rather than at other people's windows, peering in. Place, not space, frames appropriate behaviour." —Re-Place-ing Space: The Roles of Place and Space in Collaborative Systems.