If you offer only Sushi on your buffet, half your guests won't eat it. Same rule applies to song selections.
Large groups of people with varying ages need a wide variety of song types / genres. Brides and Grooms who choose to micro-manage their musical menu at their reception often make it difficult for their DJ to satisfy all of the guests. I tell all of my brides that they can best utilize our songlist by highlighting several thousand songs, even though a DJ can play only about 55 songs at a 4 hour affair.
The highlights give us many choices to choose from and tell all about their musical taste. I go on to tell them if there is a song they MUST hear they should put a checkmark by it. Any highlighted song with a checkmark becomes a MUST PLAY, however, if there are 25 or more checkmarked and highlighted tunes then the guests will be unable to make requests. This situation can be detrimental to the overall success of the party.
After all, music is what DJ's excel at and in 99 out of a 100 circumstances having the discretion to play what is necessary (within the guidelines of music types set forth by the bride and groom of course) will result in a more gratifying experience for the guests, which is usually the ultimate goal of the bride & groom. Music can make or break a reception. Celebrations DJ's