We used to have parking meters in the city, but now we have real, living human-beings to receive our parking money and make sure that we don't stay longer than we should. Which is much better, I think, because, try as I might, I could never get a smile out of those parking meters...
If you come to the city and hire a car, look out for people wearing bright yellow bibs, and carrying hand-held parking machines and bags of change. They'll tell you how much you need to pay, depending on how long you plan to park for. Oh, and do be nice to them - they're out there on their feet all day, every day, and I suspect they have to deal with a lot of grumpy, unfriendly people. ;-)