I spent a gateaway weekend in Venice with my partner at Elio's roof room. Elio's is a great host, very willing to help and he gave us many useful info.
The room is perfect for a short stay in Venice, very close to the station - you are in the main island in 20 Min by train.
It was very hot days and the heat was barely tolerable everywhere, but we slept good with the fan on, and the terrace shower was a real joy after a day walking in Venice!!
The rest of the house (toilet and kitchen) is shared but it is extremely quite and we basically did not meet anyone.
Overall a perfect place to spend few days in the romantic Venice for a couple!