If the audience is mostly going to be book and poetry writers, then work with that. Show them as best you can how YOU adapt prose writing ideas to lyric writing, and how you work out tunes. And show them what goes wrong, and lots of things newbies do that sound bad.   Transcribing things; if you don't write dots then be prepared to advise them what software will help them if they choose to. Show them what you do in lieu of dots; explain about technical stuff like recorders or whatever.

Play some examples of bad stuff that you fixed? Play examples of very bad and very good songwriting.

All most of them want to know is how they might take a whack at it, so show them. Give them a few simple tools they can use.

(Any terribly accomplished composers who show up can be told they are overqualified for your workshop, and can roll up their sleeves and help or leave.)