London Ninja

Word: Busking
Definition: the practice of doing live performances in public places to entertain people, usually to solicit donations and tips. Those engaging in this practice are called buskers. Busking is a British term used in many areas of the English-speaking world. In the United States they are more often called street performers or street musicians.
Usage: Busking is not allowed on this street corner as it might disturb the zen of the ninjas.

No Busking, please

We just call them “street performers” in the US, but here they’re called buskers.