I tidy up after myself.
Housekeeping refreshes the coffee, makes sure the room is stocked with enough toilet paper, empties the trash cans -- even if I've tidied up. And the folks that do that work, they do harder work than I do, for less money. I can afford to leave a couple of bucks, even if there isn't a whole lot of work to do.
So to answer your question, I leave the money AND lessen the workload.