One day many years ago, I decided to conduct a class focussing intently on the pivot.
People had been moving too straight.
On that particular day, a new guy turned up. He was heavily bearded with long hair in well neglected dreadlocks and his clothing was rough. He had a good attitude, and as is our dojo policy, he was accommodated ad hoc, with an admonishment to acquire a gi as soon as possible.