Re the link to an EBay auction shown below. Please advise if anyone knows if it is a slot card or a room key. The reverse is blank with bar strip. Thank you.

http://cgi.ebay.com/Circus-Circus-Las-Vegas-Nevada-Ringmaster-Slot-Key-Card-/270682330293?pt=LH_DefaultDomain_0&hash=item3f05ec94b5