Here is info on meetings in general
http://www.bareefers.org/home/node/14
The home page tells you the upcoming event
http://www.bareefers.org/home/
The nearest is the BAR Swap (as shown on the front page)
http://www.bareefers.org/home/node/13509
Although membership and a few other requirements are required to actively participate, IIRC (someone will likely confirm) you can still show up if you want to talk and meet BAR members.
The next BAR meeting is
http://www.bareefers.org/home/node/12563
(as shown on the front page)
etc etc :-D
As for membership (actual membership in BAR, not just registering on the forum)
http://www.bareefers.org/home/node/15
which is from the Membership link on the left.