Not exactly what you are talking about, but last.fm has something that tells you if the artist you are listening to is on tour and provides show dates.
When i was in college in Savannah GA, we would scrape a penny perpendicular to the ground for a few seconds and flatten one side, then put it in the dime slot. It would give you maximum time on any meter in the city. Eventually we just got a pair of tin snips and cut hundreds of pennies and kept them in the car for parking.