Professional performance is another thing. Friends are willing to perform or sing for others. It depends on whether the occasion is formal or performers' personality. He can be asked or just impulsive. Naturally, the audience must be quiet and concentrate. Whether he likes or not, there is one exception: the silence of the audience is bad news for the performer who wants to invigorate the scene atmosphere through pop music.

People can sing, dance and talk freely, because pianists are mostly amusing themselves rather than playing for others.

When someone asks artists to perform charity performances for free, such a request should be appropriate and exploratory. No matter how mild the refusal is, it should be accepted immediately.

A person should not ask for a copy of an author's work. The more famous the author, the more valuable it is.