I just had it out with the Rio over this matter.
They have an idiotic policy in place that the maid HAS to come into your room at least once every three days. If you leave a Do Not Disturb sign up, they will force their way in after 3 days!
Supposedly this is for a "welfare and safety check", but that's BS. If you offer to appear at the front desk and indicate that you're fine, they will still demand to come into the room after 3 days.
I think it's more along the lines of wanting to see if you damaged the room, so they can get a handle on the situation before you stay for a long time and fuck it up really badly.
It is VERY tough to get them to make exceptions to this policy. Two years ago, after a lot of arguing, management agreed to make an exception for me regarding this. Then I came up to my room during a WSOP break and found a maid and two other people in my room, looking around.
I got really angry, and confronted the maid (whom I had personally informed the prior day about management agreeing not to let anyone come in), and she frantically told me in broken English, "I didn't want come in! Supervisor, he make me! He say I have to!"
Apparently some jerk housekeeping supervisor decided that he was going to overrule the exception that was made for me by management, and told the maid to force her way in, and to bring two male housekeepers with her for protection.
Last year I made a big deal about this not repeating, and they stayed out, but it took a lot of persistence, including reminding them a second time when they put a notice on my door that they were going to come in the next day.
Yesterday I again got management to agree to make an exception, only to get a "text message" on my hotel phone (I had to call the operator to get it -- LOL), telling me that the housekeeping supervisor had overruled it, and "Thank you for your cooperation". I called up and complained again, and they re-overruled the housekeeping supervisor and promised me this wouldn't happen.
So ridiculous. Why is this so difficult?
Bottom line is that I don't need housekeeping in here unless I've been in the room for a long time. I'm switching rooms after 5 days anyway, so I don't need them at all. I don't want to give anyone from the hotel any excuse to come into this room.
This is important at the Rio, as poker tournaments have been a big target around the world (including the US) for room thefts, for obvious reasons.