How sterile! Are the owners robots or human? Talk about nature-deficit-disorder.
At least buy them one of the books by the Dutch nurserymen who introduced us to the many grasses to be used: James van Sweden and Wolgang Oehme, Piet Oudolf, endorced by Noel Kingsbury in his Designing with Plants, Henk Gerritsen, Nancy Ondra, or Sally Wasowski's Native Gardens for Dry Climates.
Bring nature back inside your walls. It will improve your life, and your friends will return for a second visit.
Straight Line Landscape
EasyTurf
Global Syn-Turf - Artificial Grass Supplier
Cascio Associates - Site Planning - Landscape Arch