I'll be fair, I'm not hatin' on Hipster fashion because it's just that, fashion, and when something or someone becomes in fashion or dresses in fashion, it's much easier for others with the same likes and desires to 'cluster' together...strength in numbers, one might say.
–noun [fash-uh n]
1. a prevailing custom or style of dress, socializing, etc: "latest fashion in dresses."
2. conventional in dress, etc., esp. of polite society, or conformity to. it: