Hey there! I love going out to do karaoke! 
karaoke" is also used by recording engineers to refer to an instrumental version of a recording (i.e., to a version of a recording with no vocal track).
No way. I had no idea. I thought it was all just about singing off-key in a bar! Haha.
Many artists, amateur and professional, perform in situations where a full band/orchestra is either logistically or financially impractical, so they use a "karaoke" 
I bet its been around a long time, in that case.
In the late 1960s and into the 1970s,
You know it all! You'd be fun to go out to karaoke and trivia with!
Yes. difference between Karaoke and sing-along songs is the absence of the lead vocalist.