I'm going to invite men over to my place and make my ex sleep on the couch instead of the bed.
What does your ex think of this situation?
She doesn't like it but I don't care what she thinks anymore.
It is hard to manage a relationship after it has ended but it is not good to do things to hurt the other person. It will lead to fights.
Why does it matter? She will be sleeping on the couch, she can make out with whoever she wants anyway.
This whole situation will be uncomfortable for everyone involved. You should just leave it be and not push these things.