Some would suggest Zoysia grass but it turns brown early in late summer and stays brown late into spring. It is a “southern grass” better suited for warmer climates although it might survive in E Greenbush. There a re a few zoysia lawn in the area. Here’s more on zoysia I’m not a fan. Here’ Fescue grasses grow a little bit slower than the ryegrasses and bluegrasses but not so much that it will save you much mowing time. Unless you are watering heavily, you shouldn’t be mowing much right now anyway if you are doing the right thin and letting your lawn get taller for the summer. More on tall summer lawns HERE.