I’m writing this in a blaze of blinding sun and white concrete, poolside at the Lighthouse Inn on Cape Cod, whither the kids and I have hied ourselves for a last-minute, three-night mini-cation. The Lighthouse Inn is a family-run resort founded in 1938, a cottage colony by the sea. A band was playing “Build Me Up, Buttercup” and “Sweet Caroline” by the water’s edge as we checked in.