Amateur theatre is distinct from the professional or community theatre simply in that participants are not paid, although this is not always the case, even though the productions staged may be commercial ventures, either to fund further productions, to benefit the community, or for charity. Amateur actors are not typically members of actors’ unions, as these organisations exist to protect the professional industry and discourage their members from working with companies which are not signatories to union contracts.

Most but not all movie theaters are commercial operations catering to the general public, who attend by purchasing a ticket. The movie is projected with a movie projector onto a large projection screen at the front of the auditorium. Most movie theaters are now equipped for digital cinema projection, removing the need to create and transport a physical film print.

A similar, though more rapid, evolution occurred with Jazz Bilzen, a solely jazz festival that was inaugurated in 1965 in the Belgian city of Bilzen. The 1966 festival still featured mostly jazz acts. However, by the time of the third festival from August 25–27, 1967, rock and pop acts had edged out most of the jazz bands and become the main attraction.