In fact the confusion of Gaelic/Irish/American/English/Scots songs and tunes would make an excellent basis for such a presentation!

I do a set of 3-4 one-hour long sessions on Irish Music with international students taking Irish Studies in my college.One session is just on song - and adopts the approach I've outlined, with a mix of recorded and live material.

Regards

p.s. Salem Gypsy: drop me a PM if you'd like more details.