geek
noun \ˈgēk\ :: an enthusiast or expert especially in a technological field or activity
niche
noun \ˈnich also ˈnēsh or ˈnish\ :: an environment that has all the things that a particular plant or animal needs in order to live
This is a small place for geeks of all sorts to come together to share information, ask questions, provide answers, and just talk. It’s a place for the computer programmer to learn from the carpenter, and the the cardiologist to discuss colleges with the cook. A community is built not on similarities alone, but on different skills complementing different needs.