$20, $30, $40! I would gladly clean rooms if I got these gratuities! Let's see: 4 rooms per hour; 8 hours per day. Potential gross would be over 1000 dollars per day -- cash!
For some frequent travelers to the same hotel, these levels of gratuities might kick in the nanny tax. I hope those who stay in the same hotels are asking for TINs -- just in case they are ever nominated for a government appointment and have not withheld payroll taxes on these tips.