The hospital I use doesn't have open houses that I'm aware of, but I have seen them walk people through the unit telling them about it. They are pretty open door that way I guess. I remember the first time I was going in, I called and spoke at some length with someone on the unit (probably one of the RN's). She let me know what to bring, what to leave home, how the routine of the facility works, etc. It did help me feel like I wasn't completely going into the unknown.