Not Muzak Anymore

Why is it that you hear the strangest selection of songs when you're at a Grocery store or a fast food restaurant? These places often play better music (which they pay to receive from those non-stop Music services) than landline or satellite radio. t used to be Muzak coming from their speakers, but not anymore. Years ago the Burger King in my town had a killer selection of 50's and early 60's that didn't include the obvious hits. Or maybe I mean they play the strangest songs that you would never think of hearing. I'm thinking of Sly & The Family Stone's
"I Want To Take You Higher" which stood out amongst the usual soft rock that you hear. I could do a post about every weird choice that I've heard.