Not had our wedding yet, but we're not planning on having a free bar.
We're having a small wedding, but everyone will get a glass of champagne to toast, half a bottle of wine each and another glass of champagne later, so think this is ok. We might put a couple of hundred behind the bar, but it certainly won't be a free, unlimited bar.
I think unless you're filthy rich, it's a bit odd to pay for everyone's drinks, or for people to expect you to, especially when you're paying for everyone's meal.
We're deliberately having a small wedding, so we can have really nice food and a beautiful venue. I think our guests will be very happy to pay for a couple of drinks... I hope they will be 
Plus, I remember (just about 🤕 ) going to a wedding with champagne on tap, all day, all night! I was 18. Need I say more? I seriously wish they hadn't 