I've been on a ribbon kick lately and love the look of ribbon tied around each napkin/menu. It would be beautiful all times of year and in any setting. You can use rope for a nautical wedding, lace or twine for a rustic barn, or satin in a ballroom. If you pick up napkins from the rental company a couple days early and pre fold and tie in advance.
True story, folding menus into napkins was one of my favorite tasks when I was an intern one summer in Charleston. The repetitive task is actually relaxing...plus I could usually sit in the air conditioning for a bit instead of being outside in the 100 degree heat haha.
What table top trends are you into lately?