There are many other events surrounding a wedding. And when you're the guest of honor, dressing the part shows your hosts and guests that you care. These options work for a variety of places and parties.

Rehearsal Dinner: On the Water
Try a twist on the classic nautical stripe, and add a rope headband to "tie" it all together.

Phoenix dress in white/nautical stripe, $385, Ivy & Aster; rope headband, $18, Rachel Weissman, Henri Bendel