Metaphorically, the word "Mecca" is sometimes used to describe the central place or venue of discussion of a specific interest or group of people. The implication of this is that the place described is as central or important to the interest or group concerned as the real Mecca is to
Muslims. (This is usually
hyperbole)
For instance, a friend of mine once told me that the rather goofy fellow who runs the
New York Radio Message Board calls it "The Mecca of all
internet radio message boards." It's located at http://musicradio.computer.net/wwwboard/ so you can confirm or deny that statement if you want.