Background: there was a question on Reddit about cliques in the lifestyle and how difficult or discouraging it is to navigate them. This is my modified response.
We've been in the Dallas scene for about 4 years, and we've definitely noticed the "cliques". Clique IS the most appropriate word, despite its perceived severity. But, there really isn't a lifestyle appropriate word that conveys a group of people who have found their comfort zone. The way I understand the dynamics of people around here is best summarized by classifying people into several groups.