Thanks! I knew this topic sounded familiar.

Attention K-Mart Shoppers: Collected K-Mart background music tapes - https://news.ycombinator.com/item?id=35593133 - April 2023 (8 comments)

Attention K-Mart Shoppers: Piped Music Collection on the Internet Archive - https://news.ycombinator.com/item?id=25271464 - Dec 2020 (91 comments)

Attention K-Mart Shoppers: Recordings of K-Mart In-Store Music from 1992 - https://news.ycombinator.com/item?id=10369105 - Oct 2015 (13 comments)

(for those curious, EvanAnderson's prior comment was https://news.ycombinator.com/item?id=25296389 from the Dec 2020 thread)