As I understand the beverage operations, the 15% autogratuity that is added to your beverage check goes into a pool that is shared by all the members of the beverage serving team. That includes the MDR server(s). Any extra gratuity you add to a beverage check goes to the specific server who provided the service. I always add an additional gratuity to bring the total to at least 20% and to reward the person providing the service. When I have had the wine package, the server always presents a check with a zero balance as he/she keeps track of the number of bottles I’ve consumed from the package. I add the extra gratuity to this check, usually $2 or so.