Something I've wanted to try: apparently it's illegal in Philly for a cab to drive with a broken credit card machine, or it was. It wasn't illegal not to have one I don't think, but if a car was equipped it had to work. If a driver made a pickup with a broken card machine, a rider had the right to leave the car without paying. What many people who did this found was the machine wasn't actually broke, the driver just didn't want to take credit card payments, as they got less from the fare. Suddenly a broken card machine worked. All the cabs I've ever used, and to be sure there haven't been many, had working card machines.