If your looking for delicious thai food with big portions the best place to go in rowland heights, walnut, diamond bar, and hacienda heights is Banana Bay. Since the restaurant closes at 1 or 2 am many young people gather around there to kick back, drink beers, and eat. They also have a live band there every friday night. I recommend the continental fried rice, fried tofu, and for dessert the friend banana a la mode. Banana Bay saved us from many nights of bordem!