You were wondering about LesGrandsVoisins.com? Good! Here is some info in French about:

• les cercles collaboratifs,
• la copropriété et
• les Voisins.

So this is a community-editable reference-documentation wiki. Create an account and document away (after I grant you necessary permissions). Commenting is deactivated, but you can ask for it to come back.

The name of this entity is Les Grands Voisins. See here for what commongoodhood.com is about. This website is maintained in French first and foremost.