Anonymous 
Behind the Scenes in a Hotel by The Consumer’s League of New York [EPUB ebook] 

Excerpt: "The modern hotel industry, claimed by the 35th Convention of the New York Hotel Association to be the fifth largest industry in the United States, is of comparatively recent growth. It is true that from the earliest times there have been inns and small hostels for the accommodation of the wayfarer. But this accommodation was the simple provision of board and lodging. The host and his family ran the house much as the modern boarding and rooming house is run. Until the late nineteenth century these houses, small and few in number, were usually at stage-coach changes along the road. With the great increase in travel, stimulated by the growth of steam railroads, hotels sprang up in great numbers and tended to concentrate in large centers of population. The invention of the elevator and the use of fireproof materials have made possible the construction of gigantic modern edifices. In the last few decades, under these conditions, more and more capital has been attracted to the industry until today there are 40, 000 hotels, large and small, in the United States."