In order to open your room door you have to go to the basement open the steam valve, then you head fir the ballroom where you tune the pipe organ to play the first 5 bars of Blue Danube which opens a secret compartment under the seat and there you find your key.
Pelo1968 says
In order to open your room door you have to go to the basement open the steam valve, then you head fir the ballroom where you tune the pipe organ to play the first 5 bars of Blue Danube which opens a secret compartment under the seat and there you find your key.