Thanks all. To update, I stayed at the Marriott Burbank Airport.

Prior to my arrival, I noticed my room type had changed from standard to "concierge."

At check-in, the agent verified that I paid through Priceline and that my Marriott Rewards number was on file, but he made no reference to my status. I asked if I'd have breakfast/lounge access and he nodded discreetly, almost whispering, "For you, yeah."

I'm not sure if he knew I'm Gold, or if he thought he was doing a favor.