Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
For a last note, I would personally prefer combinations that have more than one user over those that don't, if you don't want to implement all of the above. But it is of course your choice.
@DennisWilliamson I added some others. I am currently out of inspiration for creative names. (Of course, we may just put masters, fanatics, experts after, but that is not creative).