[RoboMadi]

Come up with creative ideas. Like using your 2006 aim high robot after school. Shot balls and have people catch them, give them a candy or something like that. It will help you advertise your club.
The best way to do is to keep in touch with your Principal and School Activity Director. I know marketing can be really hard, but you've to "bait the hook well, so fish will bite."
Also its always good to have parents involve in your club, like a parents booster club or something. Administrators listen to parents more than the kids or teachers. These are just couple ideas, I'm pretty sure CD users have more :-P

let me know if you need any more help. You are more than welcome.