Kroger must have changed a lot since the last time I was in one.
I hear the wildest songs over the speakers at the grocery store - Planet Queen (T Rex), Bridge of Sighs (Robin Trower), A Little Bit of Sympathy (Robin Trower), Don't Believe a Word (Thin Lizzy), Stone Blue (Foghat), and I know there are a lot of other songs that I can't recall right now. I'm sure I've heard some Blue Oyster Cult at one time or another.
The one that really got me, though, was over a decade ago in a Jewel outside Chicago, where I heard The Water Song by Hot Tuna.