Originally Posted by
Horace
...I don't understand why not all Marriott properties have guest laundry rooms, with complimentary or coin-op washers and dryers...
Elementary, My Dear Watson (er, Horace)! Providing these facilities would cannibalize their paid laundry revenue, which is quite substantial. Heck, most hotels would, if only they could, stop giving out free tea/coffee sachets and a kettle in the room.