Just a helpful comment. All of those above are to be recommended.

If you are aware that there are a few couples in the room with experience but the rest are mostly beginners ask the experienced ones to take up first couple positions at the start of a dance. It can save half an hour in calling something like Drops of Brandy or Waves of Torry.

Also when explaining something like dip and dive to beginners it's important that they listen to your description of how it works in full before trying it out.

With a dance like Drops of Brandy and beginners it is helpful if you can get an experienced couple to demonstrate as first couple in a volunteer set while the rest are still seated.