Neologism: Faraday roundtable
Faraday roundtable - noun phrase - A meeting conducted entirely offline. All portable devices and computers are powered down, and ideally locked inside conductive and grounded containers to prevent radio transmissions from reaching or being emitted from same. Similarly, no active computers are permitted at the meeting. The proceedings of such a meeting are carried out using Chatham house rules.
Named for the Faraday cage.