The only real problem was the PPL's who really needed a safety tuneup never showed up
that's usually the problem. Those that don't really need the seminar are the regular visitors, but the ones that NEED it, those that don't keep up-to-date about new regulations, etc.... THEY don't attend, no matter how important you make it sound.
I have often tried to organise such events in my clubs over the years... the members would say "great idea! I'll sign up and come"... on the night of the event, no one shows

not very motivating.....
Westy