Seed Magazine recently published a great story on the Gathering for Gardner 7 (or G4G7, for short), which I briefly mentioned back in May.

The G4G meetings focus solely on recreational mathematics, such as puzzles, magic, illusions and games, in honor of Martin Gardner. You can find even more information about these events at G4G4.com.

If you would like a better idea of what is discussed at these meetings, you may want to check out Magic Squares, Indeed from the book Puzzler's Tribute. Better yet, you can download a free PDF containing the entire contents of The Mathemagician and Pied Puzzler!