is that you register with one club to become your home club for which you get your credits. You can certainly participate in other clubs as a guest and you would be most welcomed. Your participation with many clubs will widen your network of friends and circles of influence.
Speaking AND listening skills will carry you much further than knowledge. Obama and HClinton both have excellent skills but Obama has a slight edge but enough of an edge to garner the Democratic nomination. GWB has poor skills, and got to the point where it became hard to distinguish between blunder or idiotcy.