Authentic SPICY Thai Food Bangkok - 10 Points?

Going to Bangkok agian next week and will savour nice spicy food like Somboon seafood restaurant and Quake bar ( really great spicy food with good music ) . These are spicy and authentic places to eat and may not be for farang . For ten points tell me names and locations of 5 more restaurants / pubs with good food - serving spicy Thai food catering more to the local tastes . The eatery may be cheap or expensive thats not the issue as long as its spicy tasty and authentic