If you want to know interesting people, you have to become interesting, there's no other way or shortcut round this.
And to become interesting, it is crucial that you hone a quality mind. Because if you don't transcend the whole all I care about is money, sex and popularity paradigm, you will bore the people you seek to associate with and they will quickly shoo you away.
Interesting people, by nature, are unorthodox and a generic mind is never impressive to the unorthodox. Always remember this.