Sharing Keys Is Not Secure.

Thanks for the suggestion, but in our opinion sharing keys is not secure.   There is a reason we don't provide loaner locks at the hostel.   If you give a lock to someone they (a thief) can make a copy of the key (or memorize the combination) and then return it.   Then when we give the lock to you a thief has a key.   Instead we prefer to sell locks (if you don't have one) and then you can bring it to other hostels.