I agree with DJ Vintage,
Having dj’d for around 20yrs and making the transition fro clubs to private functions – it really requires a totally different mindset and a re-appraisal of your motivations and where you get a sense of achievement.
As you mentioned, the obvious sign of success in a club is a packed dance floor. At a wedding – depending on the demographic or mix of the crowd, it could be as simple as a room full of smiling faces and tapping feet and a mostly empty dance floor.
It took me a long time to realise, as DJ Vintage pointed out – people are there for the bride and groom and family and will spend a great deal of time catching up. I have some weddings where it’s just like being in a club – and others where I get nothing but praise and claps and referrals – even though hardly anyone danced – all because I was sensitive to what the crowd needed at specific times and controlled volume accordingly. The key thing is to spend time with your clients in advance, get a feel for their guest list and agree on expectations.
Good luck 🙂