I'm around the same age. Yup. Mirror balls are 70s disco. Died out with the emergence of punk/new wave. By 82 the hideous 80s styles were already blooming--parachute pants, members only jackets, designer jeans, pink Izod shirts with the collar turned up, etc. Man, I hated the 80s. Pity too, cuz that was Reagan's era, but I was too young to appreciate that. The music and style was hideous. I'm permanently stuck in the 70s.
He couldn’t say 1970s for the DIsco ball, since McCain was in a POW camp in the 1970s.
I don’t know how old you are, but as someone who has lived well over 5 decades I can tell you the music of the 80’s(at least from 83-87) was much better than anything from 1973 on. As for style I wouldn’t give a nickel for either decade.