These days, more than a million residents and visitors celebrate the free street festival and parade, which features around 5, 000 professional and amateur performers of all ages and ethnicities, as well as bands and DJs.

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Staying connected with customers, the press and Wall Street carries an implied threat with poor Salesforce performers: A bad run-in with a client might just end up in the big boss' in-box.

FORBES: Magazine Article

In 1927 Ralph Peer, a producer with The Victor Talking Machine Company, set up a recording studio on its main drag, State Street, and by the end of that year he had recorded 19 performers.

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Sesame Workshop, which owns the rights to Elmo, Cookie Monster and other stars of the long-running children's TV show, said it hasn't authorized any street performers to wear its costumes.

WSJ: Street Characters Tread Fuzzy Legal Ground