Times have changed. Most people are obviously referring to season tickets, not club membership.
I'm a member of St George Leagues Club, which is quite handy for parking and club access. Cheap as chips too. Plus I'm applying again to be a Football Club member - just need to be nominated. The office mislaid my last application - next time I'll hand it in to the right person. These are important if you want to have real voting rights.
The Red V membership is really just for the season ticket, and has obvious benefits. It's a must imo. But I don't consider it to be a club membership (in the traditional sense).