"Yes, but then the host asks one of the guests to leave. What do you do when he hangs on, and starts having a go at those appointed to help run the party? "

It depends on what kind of time I am having at the party. The question is really one that the host should be answering, not me if I am just a guest. If he isn't having a go at me, I would probably sit back and watch the fireworks. If he is annoying me, I would speak up.

The host has to make the call, not the guest, not the bouncers, not me.