JAZZ : Five men on the same stage all playing different tunes. BLUES : Played exclusively by people who woke up this morning. WORLD MUSIC : A dozen different types of percussion all going at once. OPERA : People singing when they should be talking. RAP : People talking when they should be singing. CLASSICAL : Discover the other 45 minutes they left out of the TV ad. FOLK : Endless songs about shipwrecks in the 19th century. BIG BAND : 20 men who take it in turns to stand up plus a drummer. HEAVY METAL : Codpiece and chaps HOUSE MUSIC : OK as long as it’s not the house next door.