"Tribe-- a social division in a traditional society consisting of families or communities linked by social, economic, religious, or blood ties, with a common culture and dialect, typically having a recognized leader." Dictionary definition
In today's world, people tend to move around; so communities aren't static tribes; they might think they are with those moving in and out. Tribes might be about careers, but when it is, the tribal connection often ends when the job does. Churches and political parties are the same way-- share the beliefs or you're out the door-- by choice or otherwise. I have not been much of a joiner, but clubs could provide a tribal experience. They require having a common interest, which could last a lifetime like say gardening.