Definitely haven't been into "Laserkaraoke" as long as you have, but I do enjoy it a bit.
There was a karaoke bar near where I used to live in NJ, called "Cherries" and they had one of those massive multi-tower LD changers and a phonebook sized list of songs to choose from (including Japanese artists and songs since it was also a Japanese restaurant.) Had a lot of fun nights there with friends and one of my jobs had our Christmas party there one year. They closed up in the early 00s. I should have inquired about what they were doing with their large amount of karaoke LDs and/or equipment, but it never came across my mind, nor did I have a whole lot of money at the time to blow on anything like that.
Some 15 years or so ago, I decided to start getting karaoke LDs and then a dedicated karaoke player so I can bring it by when my friends would have large gatherings and we could belt out tunes and what not. I probably hauled all the LDs and CD+Gs out to friends' places about 30 times or so and many hours of drunken fun was had. I only have like one really funny instance where I have all my karaoke LDs and CD+Gs cataloged in a Microsoft Access database and print out 2 lists of songs alphabetized one by song title and one by artist (along with what disc it's on and the track/chapter number.) Hardly ever did any of my friends check to see what disc it is actually on.
So one time this one female friend asks for "Somewhere Out There" from the movie
An American Tail and asks if I'd sing it with her (since it's a duet.) I oblige but fail to tell her that this particular song is on the
Playboy Karaoke Vol 1 LD that I have. So we start and there's this naked female in the background of us singing this song from a family movie and she's immediately like "WHAT THE HELL IS THIS?!!?" while everyone else is laughing their butts off.
I act completely non-plussed and say "what's wrong? Just sing the song!" and start singing my part. She eventually starts laughing too and singing, but keeps cracking up from time to time when there's a close up of the woman's b**bs or butt for no good reason other to titillate (which when you think about it, how does that make any sense on a karaoke LD?!?!?)