Well yes, a lot of bluegrass bands have issued albums of pop material. I still have a copy of an album called "Beatle Country" by Joe Val and his band from the Boston area. Some of it isn't bad and some of is a little strange for someone expecting a Beatles style presentation. Mostly they had fun (and took liberties) with the material.

Some years back (36?) my younger brother was managing a coffee house in Des Moines. Peter, Paul and Mary were in town doing a concert and they dropped by the coffee house afterwords. They all sat around and traded tunes long into the night and my brother told me they kept wanting to sing bluegrass tunes. They were very fond of the music and didn't get a chance to perform it in public.

My brother does not prefer bluegrass.

- Mark