That's a basic idea in geography too; on shared public spaces you've got Staeheli, Mitchell, Neil Smith, Harvey, Brandi Summers, but for interior shared space, Rashad Shabazz's Spatializing Blackness comes to mind, esp. the kitchenette chapter.
Geographers, what else?
A (wonderful & very patient) editor is looking for a reference to cite backing up a basic idea in architecture, that shared space like hallways & streets contribute to social life, and my saturated brain is drawing a blank. What's the foundational work here? Holly Whyte? Jacobs?