I recently had the opportunity to watch another teacher do a general introduction to the standard mid-nineteenth century couple dances. That's a rarer event than you'd imagine. Historical dance teachers aren't that thick on the ground, and even at multi-teacher festivals, either there aren't any introductory classes or I'm busy teaching my own classes during them.
Watching this class reminded me of something I've been meaning to write up for months about altering how we teach this repertoire. This doesn't apply to the one-night-stand sort of teaching gig, but I think it's something other teachers with ongoing classes may find useful.