Here I am hiding behind my Leica wearing my Seersucker. I wouldn't presume to wear such a garish suit to a clients wedding, unless you think it's awesome and then I'm there. I don't photograph many weddings with my Leica M240, its a manual focus camera and often slows down my photography quite a bit. The new Leica Q is an incredible camera for events and is super quiet during the ceremony.
I have a couple of polaroid cameras that I can bring to a wedding if you want to use them for a guest book or during a party. They add a nice immediate image element to a party and also give me something to shoot as people use the cameras.