Bankley, Roger Miller did play a classical, a Gibson when I saw him. Glenn Yarbrough played a classical with the Limeliters alongside Alex Hassilev's 5 string banjo.

You can play a classical quietly, but I don't think of them as quiet instruments. I used an unamplified classical for years for a regular gig playing for folk mass at 8:00 and regular mass at 11:00, fingers only a 8:00 and with a flatpick if the organ was being played at 11:00. Never had a problem with volume. Some of it probably had to do with the acoustics of the room, but it sure seemed like the classical had a lot of carrying power on its own. Just seemed to fill up the whole space.
- Phil