The band packs down, the lights drop, and the right first track keeps every single person exactly where they are.
A good DJ does far more than press play. They watch what the room responds to, feel the moment it starts to drift and pull it back before anyone notices, and carry an evening from the first dance right through to the point where people are genuinely annoyed it is over. Full sound and lighting, a booth that looks like it belongs in the room, and a playlist built around your crowd rather than a stock wedding list.
Requests welcome. Your absolute non negotiables honoured. And the songs you never want to hear again quietly left off entirely.