There's not any sort of Bangkok deal thread? Staying Bangkok so often that would appreciate any sort good deals (doesn't have to be error fares). For example saw Centara Grand at CentralWorld for 66 eur couple of nights ago (seems to be gone now). Normal price over 100e/night.
Majestic Grande is very nice and has an exellent indian restaurant downstairs (The Great Kabab Factory Thailand). Also enjoy the lunch buffet at Dine at 7.