advertising 
more recently, hotels have used the do not disturb signs as a way to brand themselves and provide inexpensive advertising. the period of rent set by the land court is reduced to three years. viewers were presented with an analysis of a current problem within society that as of that time had no clear solution, hoping to make the audience aware of the problem and to leave the theater willing to become actors of social change. they studied languages, history, religion and took piano and dancing lessons. 