The Record House in the Ruins:

[Decimate_The_Weak]

It seems with a SPOILER key, you can unlock, and lock the outside door, but you're unable to do so on the interior.
 
IDK if this is considered a "bug" or not, but... yeah. :P

[Thomas_Not_very_wise]

Post in a exploitable bug report area so dms know what you are talking about?