How do your characters make friends? Are there rules as to who they can befriend? Are there those they have nothing to do with either for personal or "tribal" reasons?
What kind of events do your characters go to, which would help with "networking"? Are these events set up by individuals, the group they belong to or the government of the world altogether?
And how does your fictional world as a whole react to outsiders? Does it like the idea of reaching out or does it like to keep the strangers firmly out?