These are buildings designed for communal occupancy as offices, why not lean into that as residences? Think like a 1-2 floor cooperative housing for a community of 50-100 people in 25-50 family units. Everyone gets private bedrooms, storage, and a den. But the expensive amenities that foster community are shared: Large commercial-style communal kitchens and bathrooms. That would enable other big shared amenities on the floor like a gym, a daycare, or coworking desks.
The epidemic of loneliness plaguing millennials is in my estimation largely due to a lack of community. Think of the kind of community that was east to build at university - why can’t we have that in the conversion of these big floor plates