Blank cards in AC-VERY DIFFICULT-unless you are are high rated player or you catch a card maker in a good mood, which is rare, or know someone. Best results I've had is hitting them after 2:00 AM. Room keys at times I've had them give me 20 or more but most times I was told to get lost-I have a couple $$'s rolled up and let them see their tip-most of the time before 2:00AM it does not help.
Maybe your wife will have better luck-gals always seem to do better. My wife will go to a male card maker and smile and get the world-me I've tried male and female with no luck.