How to find a drum circle in your area
One of the easiest ways would be to Google 'drum circle' followed by your area, eg 'drum circle Antarctica'.
If you don't have any luck with that
(I didn't with that particular search) a cool site is
Meetup.com's group for drum circles.
(To open in a new browser tab: Ctrl-click (PC) or command-click (Mac) the link.)
Some of the listings are for paid drum lessons, led by a teacher and some are open to the public. I'd say strike a healthy balance between group or private lessons and having fun at informal sessions.
If Meetup.com doesn't cover your area, feel free to join our Facebook group and place an ad on our wall.
Also check local community notice boards or classified ad websites like Gumtree.com (click here for Gumtree London drum circle listings) or Craigslist.com (click here for Craiglist New York drum circle listings).
If there's still noting advertised in your area, its your job to start a drum circle! You'll be surprised at how many people are interested.