 In addition to theatre owners, producers, presenters, general managers who create productions and operate theatres across the country, industry specialists and vendors such as press agents, booking agents, advertising agencies, and scenery, costume, and prop shops are all eligible for membership.The League was founded in 1930 as the "League of New York Theatres and Producers".It was founded by Broadway theatre operators to further common interests, with the main purpose of fighting ticket speculation and scalping.