This bathroom has two doors. One for the guys/customers to access from inside the shop. And the other for the guys/customers to access from the outside yard.
What exists(or can be made) to make this arrangement work that allows for:
Privacy when occupied
Simplicity for the end user (customers and their kids cannot be trained)
Access from both spaces.
Thank you all in advance for your time and responses. (I agree that this setup is “insert negative adjective here.”)
This is a single user restroom.
Edited to include information I was missing.