Madame's Locker Key is a Quest Item in
How do you open a Madames locker?
Once the key have been given to Madame, the player can knock her out and search her for the key back. Now with the key back in the player's inventory, they can press the red button next to her desk, use a shortspike on the control box, and then finally unlock the locker.
Where is the key we happy few?
One of the guards will have the Kitchen Key. Once you have retrieved the Kitchen Key continue down into the building and talk to the Chef. The Kitchen Key will also open a locked Chest located on the roof.