July evenings stretch long here, and the ball fields at Hopkins Park stay busy until the light finally gives out. Ezra and Lucas Lawn Service uses those hours — mowing, trimming, edging, hauling the clippings, tidying beds and borders so a yard is ready for the weekend. Two people working a lawn together finish it while it is still cool enough to enjoy sitting in. A yard cut on Friday holds all the way through a Saturday cookout, and that is really what somebody is after. Around DeKalb the reward is simple: the neighbor across the street asks who does your grass.