A Busker is a street performer, usually a musician. A busker might also be a dancer, juggler, magician, puppeteer, storyteller, clown, acrobat, or a dog trained to do tricks. They are not asking for your help, but rather hope to receive a token of your appreciation for their art, freely given.
To throw some coins in the busker's hat, click on the PayPal button, right:
Of course, not everyone has to enjoy every busker's show. Almost everyone loves the Hurdy-Gurdy Band because they try to be good buskers.

A good busker never plays too loudly, never plays the same spot for more than four hours (except in an emergency), and is always better dressed than their audience, preferably in folksy wool or simple cotton. Wearing an unusual hat is an important part of the tradition.

A good busker not only moves his audience with tender music, but also radiates dignity and compassion for the Human Condition.

Tempting as it might be, a good busker never tries to shame a police officer who has just stopped them from doing their show. At such a moment a good busker never plays to the sympathetic crowd in a comique-sardonique freedom-for-art-and- humanity sort of way. The police officer will at the very least take the buskers' passports and call in to headquarters, (possibly leading to real complications).
Good buskers keep their pitch tidy. (A pitch is the spot where buskers have set up to perform, or, depending on context, could also mean a set, as in "We'll do a pitch or two and then go shopping.").
Good buskers appreciate the unique opportunity that fate and fortune has offered them: to be a colorful thread in the tapestry of life while living a simple life with a small carbon foot print.
Good buskers are always mindful that their audience should be treated with respect and consideration for cultural sensitivities. They remember that they are guests in the countries where they travel. They never resort to vulgarity nor publik lewdness.

Of course, a bawdy song full of double entendres is quite acceptable, and is indeed an important part of our tradition.

Some might say we live hand to mouth. Perhaps money bag to bread basket is a better way to say it.