eat. drink. sing. and rock like a salaryman. Rock Box is a Japanese style karaoke club in Capitol Hill. We have a full bar, kitchen, and 11 private rooms suitable for one to 15+ guests, as well as a party room that can accommodate 35+ guests. We are 21+. We charge $7 person/hour during regular hours and $4 person/hour during happy hour. Private room karaoke - karaoke box - is a favorite form of karaoke in Japan as well as all over Asia. In Japan, it is customary to enjoy drinks and small plates, while hanging out singing. Karaoke is a favorite pastime of the so-called Japanese "salaryman."