Before Chanet Tisdel attended an October bridal show in Manhattan, the path to her May 2018 wedding was troubled by an imbalance of enthusiasm. “I had been dragging my fiancé around to all these wedding shops and exhibits looking at all the girlie things, and he was just so unimpressed,” said Ms. Tisdel, 34, an executive assistant at Ralph Lauren in Manhattan. “He was just like: ‘I gave you the ring. I love you. I don’t understand why we have to do all this stuff.’” Then Ms.