I found this very interesting site called Looklet.com. It's a site where you feel you're playing dress-up with a virtual Barbie. Though it doesn't have real wedding dresses in its selections, it's a nice site to find inspiration for what to wear if you're invited to a wedding.
At Looklet.com, you can mix and match looks. It has tops, bottoms, dresses, bags, accessories and more. You can create casual, corporate or formal looks. I tried making some looks and found myself addicted to it. :D
The only issue I have are the limitations in terms of the colors of the clothes and the choices for shoes and accessories. But otherwise, Looklet.com is a fun website.
Here are two of my creations which I would say can be worn by guests of weddings or special occasions:
If you want to save your creations, you can simply register at Looklet.com. It's free, so there aren't much hassles.
I'm telling you, it's a great site, especially if you want to satisfy the fashionista in you. Go get addicted to it like I am!