I’ve worked at a couple places where someone had the balls to just get up and leave the meeting room at around 70-80 minutes to force a break. If we are going to be stuck in here I’m going to the bathroom and to get more coffee.
Usually by this point the stuffy room and long meeting have people going in circles. Getting up, opening the door, getting the blood moving while one or two groups have a little sidebar, usually causes the rest of the meeting to wrap up fast.
I do this at 60 minutes, even though my meetings are all over zoom these days. "Sorry, I need to step away to get some water. I'll be back in a few minutes."
I just lose track of time like everyone else has. I will follow that person out the door though because they’re right, and once 2 people go the rest will follow. One person is just an asshole. Two is a pattern and three is a movement.