The scenes with Keaton and Irons, too, rise above the mediocrity-unto-badness of Love, Weddings & Other Disasters on the strength of the actors’ charisma alone. Irons thaws satisfyingly as a snob finding unexpected love, and Keaton remains adorably, engagingly herself, turning her character’s blindness into a la-di-da form of grace. They are diamonds at a garage sale, and they deserve better.