Do not make the mistake of insisting certain songs being played at certain times, or to give the DJ a list of 40 songs to be played “in that order.” The problem arises if: the DJ is sticking to you list and no one is dancing or responding. You really would not want the DJ continue with the list- he needs to have the flexibility to do his job. There are also problems with a 40-50 song list where the DJ can play selections “in any order,” but cannot deviate from the list. It again restrains the DJ too much for him to successfully do his job. Micromanaging the DJ is the same as being in the kitchen with the caterer telling them how to prepare the food. Relax- this is what you are paying for… the DJ is paid to know his stuff! If you absolutely insist on having total control on what music is played (and in what order), you may be happier hooking up an iPod and letting it play.