One of the Busiest Starbuck's in the Country Won't Write Your Name on the Cup

One Starbuck's location is so secretive, the receipt only lists "Store Number 1" on it, the baristas are escorted to and from their post, and they won't write your name on the cup. Ironically, it's one of the busiest locations in the United States.
It happens to be located inside CIA headquarters in Langley, Virginia. At first using an alias was suggested, but even that idea made agents uncomfortable. So no names, and no frequent-customer awards cards either.