It's not as common as it used to be, but I think the point was kind of that you're not supposed to notice it?

Look into "muzak" (the style of music. Apparently it's also a brand according to Google), and some of Brian Eno's ambient albums like "Music for Airports" (which is definitely a bit more sparse than elevator music, which was often like smooth jazz versions of classic songs), but along similar lines.

I don't like to think I'm that old, and I 100% remember elevator music.

Edit: was possibly thinking of "musique concrete" rather than muzak.