Being almost 60 I have seen huge advances in disco gear over the years.
My first setup was a sound to light with Maplin record decks and a Maplin amplifier kit.
Then I moved on to a CD based disco. With better lights.
Now I have a laptop based system with modern lasers etc.
Looking back its amazing I managed with bouncy floors and record decks. I remember having ask people to dance away from the decks to avoid needle bounce.