Our apartment is very large and divided in two different parts.
One of them is reserved to the guests with a reserved bathroom.
If you are 1 or 2 persons you will have one room with the reserved bathroom.
If you are a group of 3 or 4 persons you will have two rooms and one bathroom for the whole group.
ACCORDINGLY TO THE NEW ITALIAN'S LAW: EACH GUEST HAS TO PAY 3€/NIGHT AS CITY TAX.