This is a picture from our last Christmas cruise. We would not put this much or things this tacky on a Silversea door but this was a fun way to add a festive feel to our room and quickly identify our SR.
On our first cruise after the shutdown, we put Thank You to the Crew in multiple languages on our door. It was much appreciated!
It is common on some lines and not allowed on others. If allowed, the key is to use magnets, not tape to secure items to the door. Magnets will not damage the door.
For this trip we just want to use something simple making it easy to find our door. Something tasteful.
I have heard that swingers put a pineapple on the door. Not sure if that is true but we stay a way from pineapples!