Let's take a look at one of the popular shops in Akihabara, the center of anime and manga culture. Creator's Cafe Akihabara Seisakujo is a cafe set up to be the perfect working environment for creators of doujinshi.
I'd prefer a writer studio ;) I bet there are also some of those in Akiba. I'll search them... But this seems cool. I have a 'brush pen' like Totoro mentioned and they're really great to use.