as you properly said the main problem is the limited height of the basement, especially the 1.73mt height beam.
To avoid to pass through it I propose you to enlarge the wine cellar of 1.05mt toward the double room, this way creating a higher passage and a better organization of the space.
If it will be no possible, the layout can still work with the passage under the beam.
To create a pleasant environment for You and Your guest I organized the basement in two main areas: the storage area in the darker and lower part (to avoid the light that can ruin the liquors and wines) and a living area in the higher portion of the basement with the windows.
The storage area is further divided to create an isolated wine cell where can be created the right condition to maintain the wines (i.e. temperature, humidity, absence of odours).
The wall shelves on the two side of the cell can contain about 750 bottles but one more shelf can be added on the third side for a total of more then 1250 bottles.
In the side of the wine cell correspondent to the big pillar will take place the units for the conditioning and the treatment of the air.
Nearby there is a humidor for the cigar.
The remaining portion of the storage area will be equipped with 3+3 step shelves for whiskies or other liquors.
Structure is in stainless steel, shelves in tempered glass.
Two shelves will placed under the 1.73mt heigh beam, while other two will be placed on the right wall for a total of about 500 bottles.
On the left side there will be a circular cabinet to exhibit particularly precious and rare bottles.
More shelves can be added, both in the storage and in the living area, but I’d prefer to let space for You and your guest.
The living area will be furnished with a crystal table, 4 chairs and 3 tabourets (I propose the LC1 and LC14 by Cassina - http://www.cassina.com/en/lc-collection/lecorbusier-furniture).
In the spaces besides the pillar in the end wall it will be take place a service cabinet (with refrigerator, ice, glasses, ready to drink bottles etc.) and a book shelf for whisky and wine documentation.
The entrance will be realized with glass blocks and a classic double door.
Finally, I would advice You that to provide an executive project it will be necessary to verify all the dimensions and the technical situation of the basement.
If can help I’m currently in Vietnam.
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