To be honest, I have only seen one PADI club... ever. A google for padi clubs doesn't really turn up much.

The one club I was a member of caused quite some upset in the UK, as they charged 100 a year - and then all PADI training, from OW to DM, was free. You just paid for the crewpack/pic/air/entry fee. Not sure if they still operate as a club or as a shop/school now.