Caesars Rewards Hack 2 Players one number

WE were in town at the Flamingo a couple of weeks back. Wife is a slot player -- and i'm blackjack/table games. At check in she went to the rewards desk to get a new card--and got two in her name. I used one --by day three we had a casino host coming over to her and introducing himself. We really dont gamble that much--but i guess by using the same card the amount being bet attracted their attention--we have a casino host now and free rooms! Not sure it it will work all the time--but worth a try!