Depends upon the purpose of the definition.
There is a community of individuals who relate in one way or the other to folk music and other such cultural productions.

A spectrum depending on what aspect of whatever you are measuring.

But on those spectrums of variables there are recognizable points.

I find that one dimension to look at is ability to spend money- amount of ready disposible income.

Some have more some less some none.

The trick is to let as many in to leave you their money as possible without concentrating on one end or another. If you concentrate on one end say the end with more money you will loose the other and therefore suffer a loss of volume of sales or attendence.

So it is not to say that you dont make money but that you do it in a more efficient manner which serves more people.

Remember Daniel O'connell of Ireland the great dan the great liberator. His greatest achievement was to arrange to have the dues for membership in the Catholic party drastically lowered. When he did so no one lost money, quite the contrary every catholic was able to join and contribute and that was a vast number which put him into office where he could wear his hat in parlament but it did not save him from death via hemroids (true story) but another one....

If you open the doors wider more folk will be able to come in sooner.

But you have to get rid of the status quo of resting content with th mono crop of the wealthy.

Conrad