At the Moonstone Mask, "utmost discretion" is both a drink and request, and the establishment prides itself on providing both. This dry, effervescent drink was originally referred to as "the house special," provided to guests freely on arrival as a welcome gesture in the establishment's earliest days. Each guest was greeted by the host with a promise of "utmost discretion" and handed a drink, and the association stuck.
These days, the drink has to be ordered, but patrons are assured that discretion still comes free at the Moonstone Mask.