One of the things my trainer taught me to do was teach napkin folds during the parties. It was always a quick and simple fold that was easy to teach. After a couple parties on my own I started researching different folds to teach. Now it has been about 7 years since my last party and I have not really kept up on my napkin folding. I am still confident I can pull this off though.
I went looking for some types of napkin folds I am might do for the wedding. It would basically just be my mom and I folding napkins Friday night before the wedding so the fold can not be too difficult. I do know that I want a pocket type fold so I can insert a card into the pocket. Here are a few visual examples: