You could pay cash for the incidentials, or you could use a prepaid credit card that you pick up at the gift card kiosks that would not have the name on it. I would say that 95% of the time I have not been asked for an ID at a hotel.
I would assume that people using an assumed name would have a fake id from a state far away the teenager checking you in has never seen and no clue if it's real or not.