Tips from my experience starting a cube club:
1. Buy a bunch of stickerless MF3RS's. For yourself to own and for others to BORROW. The reason that's good is because kids will peel the stickers or mess them up. And if you have a bunch of the same ones, one might break a piece, but you have spare parts.
2. Bring your own timer and let them borrow it while they attend the meeting. Also bring a few other puzzles to let them see and learn about.
3. Get their email addresses and send the members some tutorials, cube recommendations, cubing news, etc.
4. Don't think that you will teach the whole club how to solve the cube. Get them started and point them in the right direction. They will either do their cubing club homework learning the cube, or they won't devote the time t learning.