Me too! We are on a corner, and have 'verges' belonging to the county that I don't want to cultivate. So that area outside our fence is 'mow what grows' and my neighbor mows it weekly for us in summer with his rider mower in exchange for well water for his garden. A true 'win-win'.
No water, fertilizer, weed killer, fungicide or insecticide - it gets nothing but mowing, and honestly, driving by in your car you'd never know it's not a nice grass lawn. It looks fine, and costs us virtually no money, time or work.
Here's a picture of our 'lawn' under a huge oak tree on the east side outside our fence. It's nearly impossible to grow grass under oak trees anyway, so we think this looks pretty darn nice for a no-maintenance area. This was taken in March, so it's more lush in the summer months, too.