Walgreen's, Kroger, Meijer, etc. use the "In-Store Broadcasting Network" which is a direct competitor of Muzak...and sometimes they sound as bad if not worse than certain Columbus stations.
Not the ones I'm thinking of. Consistently more listenable than Columbus stations by a long stretch. I do know different stores within a chain use different "formats," so maybe we're not talking about the same music. Of course, there's also the possibility we just disagree here even though we tend to agree on lots of other stuff.