If you want a buffet with a difference try the 'seafood market' restaurant in BKK. It is an amazing experience where you take a shopping cart and pick fresh seafood and sides out yourself take it to the checkout and they come to your table and ask how you would like it cooked. I have lost the details but have asked on three occasions to BKK for seafood market with this description and the cab has always found the right place. The locals say its expensive but for two we spent around $70 and had mud crab whole fish prawns and alcohol plus sides and could not eat everything. Fantstic venue for seafood with a twist.