Karaoke
Karaoke (カラオケ) was invented in Japan and is the most popular form of entertainment for young Japanese. Most cities in Japan will have some kind of Karaoke Bar or Karaoke Box. The bigger cities will have karaoke boxes that occupy several floors of a building. You and your friends can rent a room to yourself for an hourly rate that often also includes all you can drink, with refills ordered through a phone on the wall. The major chains all have a good selection of English language songs along with the classic Japanese pop songs and enka.