Discreetly slip out of the meeting room, citing an emergency phone call or a family member in distress.
Learn advanced signal flags to communicate with your escape team.
Create a fake meeting-related task to hide behind, like "I'm just going to review the meeting notes."
Create a hidden emergency exit path through the office, like a fake fire exit sign.
These techniques are not endorsed or approved by any meeting-related organizations. Use at your own risk.