Long live eclecticism! The Boulder group I sometimes sit in with calls itself a Bluegrass Jam, but in a recent session you would have heard Soldier's Joy, followed by John Hardy, followed by Townes Van Zandt, followed by Whiskey Before Breakfast, followed by the Beatles. No one seemed to complain about any of it, because most of the participants are musical dilletanttes at heart. Beware Purism...that way lies anger and frustration!