I was interesting in how some of you might manage a "Do not Play List" I have lots of play list for different things and I do different venues. However some venues have their own do not play list. If I have a list 1700 songs not to play that could cut across several of my existing lists it is hard in realtime to identify a song as do not play short of having an assistant checking the list each time. It is like I need "subtractive playlists." Any Ideas?