When modern bling meets old-world ballroom, romantic sparks are sure to fly

Simple centerpieces succeed with a single eye-catching installation, such as this crystal-festooned tree, as the party's focal point. The main attraction: Manzanita branches—spray-painted silver, and dripping with crystal ropes—sit atop a special champagne bar (or escort card station).

Tree by Geoff Howell. Crystals, from Swarovski crystal components. Site, Twenty Four Fifth Avenue, New York City.