it's unethical as far as I am concerned. This is short sighted, because he can't not know that this will reflect poorly on him. anyone and his dog can figure that out. he can show off his estate to the others, which is infantile.
I can only see one benefit to this, and that's that he has full control over what happens over there. sometimes people use sneaky strategies in negotiations like vary the temperature (make it too hot for old men, which most of them are) or too cold for women, and you put them in a position where they don't think straight. I wouldn't be surprised if he pulled that kind of tactic.