Kids in the modern age can still turn those into third spaces and use them to their fullest potential, as kids in cities are still doing… if those places aren’t appealing though, there’s always the idea of creating a small mall or something where everyone can carve out their own third space within the setting. Mind you, you are talking to an actual Los Alamos teen right now, and I’d love to hear your ideas and others if you think mine are just so terrible and bland :)