In Mexico City there is no such thing as a free ride. This includes going to the restroom (sanitorios in Spanish). Throughout this trip we have had to keep change so we can use the restrooms. Sometimes if you go to a restroom you can use the restroom and not have to pay, but most of the time if you are out and about you will have to pay. The going rate is between 3 and 5 pesos (25-40 cents) Most of the 3 peso restrooms are automatic, you put your money in a turnstile and it allows you to push the door to get in. In the 5 peso restrooms you will usually find an attendant who after paying will give you paper towels and/or toilet paper. In some restrooms I have seen people leave without paying the attendant, but this is considered extremely rude as this is usually the only payment these attendants get for maintaining the restrooms. Restrooms are usually clean but not always maintained. Also if you find a free restroom don’t expect it to have toilet paper (I always keep some in my pocket).