Flavor Tripping Parties:

"miracle berries, also known as miracle fruit or Synsepalum dulcificum are fresh plants indigenous to west africa. the fruit when consumed have an extraordinary affect on your tastebuds. scientists say a protein in the fruit works by binding to taste buds and altering the tongue's so-called sweet receptors to activate when sour foods are eaten. the "miracle" is everything sour and bitter will taste sweet temporarily."

This company sells this stuff in pill form. Apparently they have parties where everyone eats the berry, and then tastes stuff.

(Click the pic to check it out!)