What would qualify to you as the most memorable chorus in music history? For me, it would be the chorus of "T.N.T" by AC/DC. It's not as if I particularly like AC/DC, but the chorus of that song keeps playing on and on in my head these days.
Hotel California. Period.
Thanks to too much time around guitar amateurs a decade or so ago . . . Smoke on the water. Though Hotel Cali's a close runner-up, I think.