Okay, maybe they're not totally worthless, but in trying to type a person, yourself especially, it's not wise to consider them too seriously. They're too easily misconstrued, and there are too many factors that could make one appear or identify with another "club".
The perfect example would be highly intelligent geeks. What highly intelligent geek isn't going to relate to the NT club? And what highly intelligent person isn't at least a little geeky and different from most of the people around them?
Determining one's quadra values (Te, Ti, Se, Si, etc.) will get you far, far closer to determining their type than this club bullshit. In the very least, club should not be determined until quadra and is already firmly established and only if temperament isn't clear (perhaps to decide between activity partners or dual halves, for example).
The bottom line is that if your Quadra values are not clear, then you should focus on figuring out that BEFORE giving temperament, club, or any of the dichotomies serious consideration.