Genshiken had a lot of vidya from time to time, from cosplays, consoles, actual discussions, gameplay and more. It was quite fun to watch for those things alone.
It was mostly a mix of 5th and 6th gen stuff since it came out around 2003. Their club room had a Dreamcast and PS1 hooked up that they used a lot, I think they also had a Saturn, Wondermega or a Neo Geo as well but I could never tell. They also played Puyo Puyo (although it was on PS2) and Guilty Gear a lot, but I think the games became more modern as time went on.