http://knowledge.wharton.upenn.edu/article/sweetgreens-nathaniel-ru-everything-last-longer/

Finally, Ru stated, it is important that sweetgreen also services its employees. The community, he said, starts with them. “Yes, we are a cult,” he admitted, with only a slight chuckle. “We want to hire not just good, but great, people, so we often use the snowball effect, hiring friends of the best employees.”