To be honest with you I DJ at a fair few weddings and speaking from personal experience unless you really hit the top end of the market I think you will struggle. I've seen people book a DJ and a band and the band always struggle as while they can do requests if someone asks them for the latest song by the Sugababes or Abba you're going to struggle. This invariably leads to people being bored and wandering off, however, if you advertised in Tatler thats a different proposition!