My hall's laundry system.
Here's how it goes: The machines are $1.00 to use, but they don't take cash. You have to use this cash card in a machine in the room that's connected to the washers and dryers, but the machine to put the cash on the card is in a different room. So when you run out of cash on the card (which happens often, since people rarely put more than $10 on it at a time) and that machine stops working (also happens often, because it's shit), your only hope is to find other people with cash on their cards. It's even worse if you pay for a machine and then you end up being the person writing the "OUT OF ORDER" sign.
I'm so glad this is the last time I'll be using it.