I used to work for the cruise lines as an Officer, and had to regularly do safety briefs with guests, as well as stopping half way through a fire drill (in full fire kit) to explain politely to people what was happening if they hadn't heard the announcements.
Taking your attitude to work and being impolite or too brusk would have resulted in a disciplinary. But then working on the offshore rules they could be more strict without fear of comeback.
You learn't how to manage a crowd of people in a friendly and polite way, whilst affirming your authority and ensuring they understand the safety standards.
Now I work in yachting, and have to be even nicer!!!