The Japanese otaku (or geek) has recently undergone a renaissance of sorts, with the likes of maid cafes and Akihabara gaining something along the lines of societal acceptance. A shift that has even seen bars based around model railways make the news with barely a hint of head shaking, let alone unrestrained ridicule.
Yet as positive as this may (or indeed may not) appear, it quite possibly leaves the once ostracised otaku little opportunity to meet up with others of a similarly obsessive nature — apart from under the prying eyes of tourists or first timers. A situation that has presumably prompted one ambitious bar owner to open a geek focused getaway.
Dress code (or even sense) discretional.