Saturday morning in Berkley is sprinklers ticking, a dog somewhere down the block, and dew still silvering the bluegrass on the front lawns. Flawless Lawn Care Services LLC likes to be the first sound after that — a clean pass across the yard, then a second at a right angle when the grass has a mind of its own. Between these mid-century blocks north of Denver most lots are modest and every square foot shows, so the trim line along the foundation and the edge along the sidewalk carry the whole look. Clippings come off the walks and the driveway before anyone can track them inside. By noon the street reads as a row of green rectangles with sharp corners, and the weekend can start.