Every year in our house we put place cards on the adult table that say "We are grateful for our friends and family." It's our way of saying thanks for coming and we love you guys. This year I was walking down an isle at Target and came across these adorable felt stickers. All I did was print out our little saying on white card stock. Then I took the stickers and stuck them on the sides of the cards. Ta-da! Super simple, super cute. You can take this idea and customize it to whatever you have on hand.
The silver ball place card holders add a touch of elegance and are available through "beau-coup": http://www.beau-coup.com/silver-ball-place-card-holder.htm