Fit for both “Thai beginners” and vets who cry “bring on the hot sauce”, the “tasty” dishes at these “everyday-type” Siamese “standbys” in Copiague and East Northport are “well executed”, nicely spiced and “efficiently served”; the digs are “sparsely” appointed, but these spots “won’t break your wallet” and diners “leave satisfied” so “who cares?”