The servers at the Mask have a sterling reputation—they are attentive, intelligent, and graceful. They are also anonymous. Whatever their species, whatever their gender, all servers dress in sheer black and wear bespoke masks to disguise their faces. The servers also wear amulets that protect them from mind-reading and mind-control. All of this anonymity makes these servers appear especially trustworthy to any guests looking for confidantes to speak to or perhaps to spend a few hours with in one of the private rooms.
On one occasion a guest insisted to his friends that he had identified one of the servers by a beauty mark on her neck. When he looked again, the beauty mark had moved to another server, then to all the servers, then to none of them. The Beauty Mark cocktail serves as a gentle reminder to guests that they must respect the servers' privacy just as much as the servers respect theirs.