Here is the letter:
In June 2000, J.W. "Bill" Marriott Jr., the son of Marriott's founder, defended the distribution of pornographic movies, saying they were inseparable from the rest of the chain's TV offerings.
"The in-room entertainment operators who provide our systems rely upon a certain volume of movie types in order to be economically viable," Bill Marriott wrote to Bill Johnson, executive director of the Michigan-based American Decency Association. "If we were to eliminate the 'R' and non-rated offerings, the systems would not be economic."
http://www.foxnews.com/story/0,2933,288253,00.html