Suggestion - make the "demonstrators needed" thread a little more specific. Many people don't know what's expected or what's needed. Phil's thread was very specific: I need a helper on Saturday, no knowledge required, we'll be doing steambending.
So, perhaps something like: "Looking for someone to demonstrate how turn a basic pen on Saturday morning, from 10am through noon. This shouldn't be too fancy, people tend to lose interest after a few minutes anyway. A lathe and some blanks will be provided, but you'll need to bring your own tools. Also, feel free to bring your own blanks, nothing better than working with familiar wood."