That hurts andyman! I have been shuffling since I was 18 (now 6 years), you can basically shuffle to anything. Everyone has their own preferences when it comes to pace of shuffle, but as people have said depending on the crowd it will be either hardstyle or electro/house. Anything with a solid continuous bassline, and good breaks/uplifting parts to take a breath to work well. Basically throw out a track which you think will work well, see how the crowd reacts and if its what you are looking for follow that trend. BTW LMFAO - Party Rock Anthem was an abomination to shufflers/shuffling