What kind of music do you play John?
Most guests like to have a dance (some just like to listen), so in general, I try to please everyone and play a wide selection of popular floor filling songs suitable for your wedding entertainment from the 50s,60s,70s,80s,90s,2000s and normally some current Chart hits. you can have some 'cheesey' music played if you want.
I normally provide a Wedding Planner in which the Bride and Groom normally indicate which songs they would like played and which songs (if any) they would not want played.
Generally speaking at most wedding receptions (which is a family reunion in many ways) I would normally be asked to play some Country music (Dolly Parton, Kenny Rogers etc..) and a few Waltzes and Jives, which prove very popular for both the young and the more mature guests.
If there are any children present I would normally play a few songs for them and maybe a few games (children are guests too and have every right to be entertained!).
Not everyone has an extensive music library, memory or knowledge so why not take a look at my 'Music ideas section'...you may get some inspiration.