This could work.......
You could put a stair case that loops round and up where the back little room is. I know you're loosing a room but you will have the exact space downstairs and upstairs.
I remember you as a moderator and like other people have said - I also like the way you handle sits! You're a great role-player within the community and I hope you can become one the the staffing team once again! +Support
Good Luck