I really do not drink a lot of vodka, it's not my favorite drink; but I have heard that the Gray Goose is a Premium French Vodka that should not be absent in a bar that boasts its quality and prestige. I haven't had the opportunity to visit the Cosmos Hotel in Berlin; but, the combination that shows us comfort, quality of service and quality in the Bar, we will have it pending as one of the best options in Berlin. Thanks for the info. Greetings.