I have (yet another) concept for social media (don't worry, it's cooler than all the other ones). And I am looking for ideas about where to deploy it first. The market group is 18-35 yr olds who are willing to spend money on technology. Within that group, I am looking for networks that are neither too loose nor too tight. Here I define a loose network as one where any two people that meet are unlikely to ever meet again by chance. I define a tight network as one where everyone already knows everyone else, and in the worst case, no one is reaching outside of that network.
I'm looking for examples of networks that are in between these two extremes because I think that this is where ideas will spread more rapidly. I think the best case would be one of these "in between" networks that is loosely connected to other "in between" networks.
So any ideas for real-life networks like this? (By real life, I mean in the flesh as opposed to online.)
Just in case you're interested, here's my other question on networks.