Is it descrimination that aYouth Hostel requires a credit card to rent a room?

do its not descrimination. they want to make sure you can pay for anything you happen to damage. what if you just payed the $40 and stole the sheets, pillows, tv, radio, etc. you could make it out and get away with it. the $700 is collateral. you get it back if the room is the same when you leave.