What movie is this? [closed]

I cant remember the name of this movie but I remember scenes in it. I think it was a horror/thriller and It looked like it was aired in the early 2000s? It's basically like the people get invited to this house for this survival game show.

In one of the scenes one of the ladies who lost was sitting next to the pool with like a weight tied to her ankle and she gets pushed in, its later discovered that she was turned into food. Another scene was when the two remaining people is a man and a blonde woman and the man sacrifices himself and dies by being hanged.

After that the woman goes to a room and finds out the man who is running the whole thing wanted revenge because she had chose another man to be with instead of him. She then attempts to act nice and seduce one of the men who is helping the man who she rejected and she is able to escape.

There was also a scene where two people are sitting on a couch and a head of one of the contestants rolls toward them.