I could not find this released, so I am gonna build a repository of the room's I haven't found and decided to make myself.
Welcome Lounge
The floor model.
And the background:
Imgur: The most awesome images on the Internet
Positions:
OffsetX: -801
OffsetY: 905
OffsetZ: 9930
With the background placed on the upper most to the left.
You may need to place the background furni down on the specified location, before you update the room model. As the tile actually get's removed.
Result:
Hope you find this usefull, more to come.