I just added a bunch of various hotel room key cards on my Delcampe store. There's casino as well as regular hotel cards, probably around a 100+ new additions. There's over 1,900 room key cards on my Delcampe store now.
Here's a link to my room key listings on Delcampe. If you want to see just the casino cards, add "casino" in the search box and click the magnifier or press ENTER. Over 1,300 of the 1,900+ cards are from casinos