When I was in Japan, I used to go to karaoke boxes. Literally, it is a small area that looks like a telephone booth. There are two chairs and one karaoke machine in front of you. If you want to kill some time and practice a few songs before singing in front of your friends, this is a pretty good choice. They also have bigger private karaoke rooms so you and your friends can have enjoying singing within your own circle.
The song selection is all automatic and you can pick and choose any song you want through a console. In the past, when another karaoke room was using that particular disc, you would have to wait until it became available. With the new technology, it is almost like karaoke-on-demand. Try going to a karaoke if you go to Asia, it's really fun!