I might nodder off but at least I wasnt pushing people into anything.
Like I said, dannywoof, if someone isn't pleased with what's being said, let him or her invest time and energy to produce their own presentation. Otherwise, listen to what's being said, ask some questions, and take away any ideas that may help you.
If it's a matter of manners, as your text alludes, you wouldn't have tried to dominate the evening like you did.
It might surprise you, but there were a few others in the room with some knowledge of the business.