Originally Posted by Zarf4
I used to bring back keys for a friend that 'collected them'. Thought it was rather odd, but eventually found out that he was really going to places like Vegas, staying at some fleabag hotel & using the 'collection' to flash at the attendant at the better hotels to get access to the pool. He also used it for the the free breakfasts @ the Embassy Suites. Thought that was really cheesy and I never bring back cards anymore.
That is an iffy strategy for the pool areas.. if you show up late in the afternoon they will let just about anybody in, key or no key. Often there will be nobody at the entrance. If it is at a period of high demand they will scan the key in a reader to check that it is current.