How to pay for laundry when you have enough money to do laundry in dimes and nickels but not in quarters:
1. Grab handful of dimes/nickels.
2. Go to a vending machine.
3. Put in two dimes and one nickel, or five nickels, or three nickels and one dime, or whatever combination of dimes and nickels that make 25 cents, in the coin slot.
4. Press return.
5. Obtain quarter.
6. If the return button is pressed and nickels and dimes return, move on to the next available vending machine and repeat steps 3-5.
Note: Pennies do not work; collect them in bunches of 25 and take them to the bank to exchange.