There are literally almost no lawns in Cambodia. They are not part of the culture. This rare expanse of grass is part of the on-going renovations of one of the two major government hospitals in Phnom Penh. It might seem these people are enjoying a picnic and have found a nice spot, but actually they are camping out while a family member undergoes treatment in the hospital. Hospitals in Cambodia do not necessarily provide nursing service, food, water, bedding, etc., so the family must come along to provide what is needed.
The nicer spots under the trees have been taken so these families are camped out behind one of the buildings. They came prepared with their fold-up beds, though.
