Far out, man! ;-p
I first heard plugs for LP (whoa- yet another record reference) when I got home from the Navy in July, 1972. I thought, “That’s not a topping I’d order, and I’ve never seen it offered by any eatery I’ve been to”.
I think I understood the reference the next time I beheld one of my vinyl pies. ;-)
What do you think would do more damage to a stylus- a licorice pizza or a vinyl pie?
Did you start going there in the 80’s, and was that in the Bay Area, or were you a Valley Girl?