I have always enjoyed collecting things that are from old bars etc. I started picking up a few things years ago from the Kansas City Playboy Club. It was located at 11th and Baltimore in what is now the Mark Twain Tower. I was too young to have ever gone to it, but my parents went a few times. According to my mother it was a very classy place and was quite formal. It was not a strip club or anything like that.
People who went there had keys for their accounts in the early days. Later they had metal credit type cards. I have two keys from KC. They were very hard to find, but I actually found two.