Robert Crumb who plays ocasionally with the East River String Band had his own band The Cheap Suit Serenaders.
I have compiled a playlist with videos by Robert Crumb and his band, this includes a nice selection of pieces from the 20s and 30s and original compositions by Robert Crumb, with mandolin, banjo, guitar, kazoo, and other instruments.
This is my playlist:
Additional Informationen
Interview with Robert Crumb: http://www.downhomeradioshow.com/2011/02/interview-with-r-crumb/