The best one was located at the absement of LE MERIDIEN PRESIDENT. it was called EL NINHO first and later they changed to LA NINHA....closed down at the moment....The Band from Colombia was superb....
Another one is Senhor Pico (REMBRANDT HOTEL) Soi 18 I think....good food and live band. The music is not nice when performed by the Cuban band but doable after all....
Another one was SALSA Club and kept moving to several places including Soi 22 dunno where is it now....there is another one in the basement of the PATHUMWAN PRINCESS Hotel, although this is my very last choice....