The Weighing Seat is a pretty nifty design by Atypyk design studio. The chair combines a weighing scale and a seat in one design. The aesthetics of the seat resemble that of a normal scale, but with legs.
They should have these seats at all open buffet restaurants. Maybe when you see how much weight you are putting on right then and there, you'd cut down on the gluttony. I'm sure the restaurant will find a decrease in the consumption of food.