A Saturday morning in Leonia sounds like mowers three streets over, all of them working under the same canopy of old sycamores and maples. Los Amigos Landscape LLC is part of that sound from spring through fall, cutting, edging and trimming lawns on lots that are narrow up front and long out back. Getting equipment down a driveway barely wider than a car is its own skill, and so is leaving not a single clipping on the walk. Cleanups come around twice a year, once for what winter leaves and once for what October drops. The result is a block that looks looked-after, house after house.