Asoke, Prom Phong, Thong Lo are the most happening places in Bangkok. They are all within easy reach of Grand Sukhumvit Hotel Bangkok via the BTS Sky Train.
Asoke offers a multitude of shopping options with Termainal 21 Shopping complex, as well as many fashion boutiques through out the area. Asoke also offers many restaurants bars and high-end massage spas, as well as being a key residential area.
Prom Phong, apart from offering the luxurious Emporium Shopping Centre, also offers an extensive rage of restaurants and bars, tailors to Japanese and those who enjoy Japanese cuisine.
Thong Lo, know to locals as the Hi-So area of Bangkok, is an area filled with gourmet restaurants, bars and high end clubs. Thong Lo although not always on a tourists to do list, is actually one of the most happening places in Bangkok outside of the normal tourist areas.