It definitely depends on who you get at the front desk as well, I would believe. One time I was staying on a AAA rate (a year and a half ago) and was asked for my AAA card by someone being trained - at that time I was never asked for proof so I was a bit surprised. The trainer then told the employee that she should always ask for it but if the customer is Platinum, don't worry if they don't have their card. I'm wondering if it this could be similar to a corporate rate. Needless to say, I had my card and was Platinum so in that scenario I was covered.

Also, as Pooker asked, what is a gibs?