[ralph]

Which is why it's odd that most washrooms have you pull a door by the handle to exit, a handle many others have probably touched without washing their hands. Ikea is one place that comes to mind that avoids this, instead having a sequence of offset walls to give privacy without a door.

[cperciva]

I see that design quite often at airports too -- if you have a large volume of traffic, doors run into collision issues.

But doors do have another purpose in addition to privacy: They contain airflow. I suspect that where this design is used there is extra work to ensure a persistent flow of air coming in through the entrance and then being evacuated from within, similar to negative-pressure rooms in hospitals.