Piper and Annabeth's favourite song was Amnesia, so they would blare it out loud when they went to visit Jason and Percy in their cabins. When Piper played it Jason would walk out saying "No, no, no, no, no!" Covering his ears.
Percy would take the closest hard object and hit it over top of the radio. Then he would stand up and say, "That machine knows nothing!!!" Then go back to what he was doing before. Basically not the best song to listen to.