Ok but lets say that there are 20 cliques. I would think that out of those cliques that 1 person from each clique goes outside of their clique once in awhile and hangs with another clique every now and then.
Its just like high school. Theres always a jock that has a stoner friend that he was best friends with in 3rd grade and goes out to smoke a doobie with cuz he doesn't want the other jocks to know about it. Theres always a stoner that has a friend in the band clique that goes out with the stoners once in a while and vice versa. That band person has a next door neighbor in whatever clique that theyve known their entire life and is still friends with and they hang out with each others cliques every so often.
Then once in awhile there is just that rager where all of the cliques come together.
This is all contained in an area of about 20 square blocks and everyone has a cell phone. You don't have to be best buds to know what is going on in the bigger circle.