Hi,
is there a way to have an unplayable (unselectable) sim that would stay 24/7 in a room without leaving the lot at a certain time? Something like the cashiers at community lots, you can interact with them but they won't do anything else.
For example, I need one sim to stay behind a desk 24/7, and other sims in the lot must be able to go and talk with him. Is that possible in any way?
Thanks in advance

Is the place where the unplayable will stay a playable sims business?

I've not tried this yet, but I plan on it after seein Jessa (Jessa Channel on youtube) use it and explain how it works.

While it's called the all in one nanny it has many other uses as well.

http://www.modthesims.info/download.php?t=286864

No, just a normal residential lot. I literally need a sim to sit down 24/7 without him getting up to do stuff or even worse go away

You will find him being selectable is what you need not unselectable. Tell him to sit and place a snap dragon or other mood booster next to him then turn his free will off. There is a mod by Pescado which gets added to a sims pie menu where you can turn free will on or off on individual sims, it's called the Autonomy Controller.