IQ tests are iffy, and, frankly, the ego they can give you can be problematic.
As for High IQ societies... I\'ve known two MENSA people. One was a nice guy. The other was a woman who had so many issues (Some of which I can\'t discuss here) she would be more useful to the world being used for human testing. Not to mention being a serious jerk.
MENSA is more of a High Ego, low social skill, questionable mental health group, and I imagine it\'s the same for others.
Also, if you have to pay, that\'s the people with the even higher IQs making fun of ya.