BuskĀ·ing: To play music or perform entertainment in a public place, usually while soliciting money. In this case, on the streets and subway of New York City.
RELATED LINKS:
http://www.buskersadvocates.org/saaNewYorkCity.html
http://www.timessquarenyc.org/then_now/streetperformers.html
[...] Apple Channel (subscribe) has provided this candid view of several buskers in NYC. [...]