From the NYT Sunday Styles:
There are people (specifically: 10 people) who call themselves “cavemen” or “paleos” who live in the city, but try to replicate in diet, exercise, and other lifestyle choices, the caveman lifestyle. They eat raw meat and leap around barefoot through the brush. They hate vegans, and judge each other for not being extreme enough cavemen. They have a “chieftain” named John Durant who makes them jerky from his deer organ-meat-holding meat locker. They only have one cavewoman, whom they presumably share.