[nvy]

>Today, unless in a secured EM cage, there really aren't that many places where you can be certain you can have a private conversation, face to face.

Even then the assurance is only so high. Governments operate what are called SCIFs, Secure Compartmentalized Information Facilities, where they not only conduct physical exclusion and EM hardening but also acoustic damping so that an adversary can't, in theory, listen through the walls with a fancy stethoscope or a laser microphone.

There's a scene from Neuromancer where Molly and Case pay another character for a private discussion room, which is basically a cyberpunk SCIF. I've always found that scene oddly prescient; privacy today is quickly becoming a luxury.