Cletus is in the room number 1. Maybe you could get yourself into there.
Have you played with the intercom already? There is one in your room.
Call to the reception and order some food. You have the menu, right?
It must be something tasty, I guess. So, it is 12 o'clock.
Well, it is a point and click adventure. The time does not advance on its own. Maybe you could fool the receptionist a little.
There is something else on the wall at the restaurant. Other side of the clock.
Yup. Remove the painting and tune the clock. You have to screw the nut with the screwdriver. Twice.
Now it is your time to take his role. Talk to the receptionist dressed as Cletus. You get a key.
Go try it.
It is. Give it back to the receptionist.
Now, don't let Cletus get his own key.
I think the clock on the wall acts as a key holder.
Screw the nut, again. Twice. Cletus gets a wrong key.
Go talk to the receptionist, again. Give him your other key, number 5.
You should screw the nut again. Twice. Then he gives you the correct key. Key number 1. Use that to get into his room.