For the cheapest local food, head into the centre of town. Across from the River Kwai Hotel, the outdoor restaurant called Day/Night Market serves some very delicious and inexpensive Thai food -- come here for their spicy stir-fries or papaya salads if the tourist fare at your guesthouse is too bland for you. A number of food stands operate around the bus station throughout the day and early evening, selling grilled chicken, cheap snacks and fresh tropical fruit. Also near the bus station, you'll find Srifa Bakery, one of the best places in town for real coffee. They don't have an English sign, but it's a massive place -- look out for the blue banners and the giant billboard advertising their baked goods, including delicious pandan buns and young coconut pies. Closer to the traveller strip, a great Isaan restaurant is found across from Nirvana Guesthouse.