Here's an idea for a small bar in a corner that you could close off with beautiful draperies. The second photo shows a pretty bar cart which could hold the necessary items, and the third photo is of a simpler butler's tray.

Here is a Houzz ideabook: https://www.houzz.com/magazine/home-elevators-a-rising-trend-stsetivw-vs~2021074 Here is an article: http://www.accessibleconstruction.com/services/ramps/residential-glass-elevator.html

To have a 'traditional' look, the floor plan may have to be altered. Perhaps this should have been discussed with your architect beforehand.

Looks wonderful. My only concern- is the kitchen large enough for all of those delicious Indian dishes and family gatherings? Is part of the mud room on that floor for food prep and storage? If not, perhaps make the kitchen larger and mud room smaller.