Because they are highly public places and because of the air of quality that the use of luxury wood suggests, restaurants especially use a lot of the heavy wooden furniture.

This is a restaurant in a popular rest area on the road to Kampong Cham Province.
A table made from a huge solid slab of wood surrounded by heavy wooden chairs.
A simpler style of stools but they’re still heavy and solid.
Another simpler style in a restaurant that doesn’t have the large decoration budget.
The cashier station of a roadside restaurant. It has to be wood.
Even the little roadside rice shops feel they have to have the heavy wooden furniture.
Another open-to-the-elements roadside eatery.