When Erin Osher, a public relations executive, and Ari Yaun, a television editor, were set up by a mutual friend, not much came of it. Sure, they each thought the other was cute, but they stayed casual acquaintances for five years, seeing each other at group gatherings. But then Ari moved to Erin’s neighborhood. He called her for a second attempt, and this time there was chemistry. Three years later, on August 27, 2011, the Brooklyn-based duo tied the knot in the groom’s charming seaside hometown of Portsmouth, New Hampshire. The Moffatt Ladd House & Garden, a historic landmark, was the perfect location for their low-key celebration. With help from talented family members and loved ones, they personalized their nuptials and gave their 98 guests a weekend to remember.