If we protect one they'll just target the other.
We need to time this protection for the night where we only have 1 confirmed townie alive. So... day 6 now, day 8 we vote for yellow, day 9 we vote to protect the last of me/turm/kalor/Gotham, night 10 scum has to kill an unknown (or noone).
I think it's day 8, unless I miscounted.
Choosing some of these rooms might make others unavailable. I don't think we'll go that long with rooms to choose. If i had to make a guess i'd say choosing purple/grey will lock out the other. Choosing green/yellow might lock out the other though i don't believe it will. So i'm guessing we'll have a special room for nights 6/7/8 and then it's on to the white room until the end. Assuming the game won't end first ofc.