Thinking of doing free retiree seminars

Hi All,
I'm from Adelaide, Australia, and for a while now I've wanted to contribute something to society, and one of the ideas I thought of was to teach retirees, or the elderly, a bit about the internet and making money.

My idea came when watching a current affairs program on the plight of the elderly who suffer from too many health issues along with having a lack of money to boot. I have always thought that the two issues occur together and feed off each other, and that boredom is a major cause. Anyway, whether or not I am right is irrelevant, I thought it would be nice to do free local seminars to teach people how to use the internet too, not just to make money, but more as a way to cure boredom by taking their interests and hobbies to the internet.

Ideas, include teaching them about the many free ways to get set up and contributing on the net through blogs etc, how to network with other like minded people (sharing the same interests etc), of course, the many ways to then make a part time income...and so on...

I have built plenty of web sites, and have made enough money that most retirees would not sneeze at, especially if they made that money around something that was dear to their heart.

So, my question is, how could I go about setting this up. I am only 37 and have little clue or idea of how the elderly community functions, how to reach them, how to organize such an event, and keep the costs down at the same time. Maybe someone has done this already somewhere else in the world and can offer some pointers.

All the best
Dean