Kio Shimoku attended the University of Tsukuba, where he joined an otaku club. Some years later he drew on his experiences to create the manga Genshiken.
Today at the University of Tsukuba there is an otaku club called The Society for the Study of Modern Visual Culture (現代視覚文化研究会, Gendai Shikaku Bunka Kenkyūkai), or Genshiken for short, though probably for copyright reasons they write it GSK instead of げんしけん.
They have a Twitter account.