Quarters: Pay phones, pop machines , shopping carts. And, Oh yeah, they're also money!
Payphones: They still exist in MANY places and a little more situational awareness will probably reveal them. I realize that I'm in the minority of non-cel phone EDCers, and am probably inclined to be more aware of these things, but if haven't you ever had a cell phone that stopped working?
My cell phone stopped working when I disconnected it from the charger in my Jeep a few months ago. It just wouldn't power on anymore. There I was, six months pregnant, in the winter, on an public transit excursion to the big city hospital, while hubby was at work. There was a fire on the subway that day too, which stopped the trains for a few hours, which made we exceptionally late getting home. Thank goodness for pay phones!