Halloween Recommeded Restaurant and Buffet  
1. Sofitel So Bangkok 

SO Sofitel Bangkok is a 5 star luxury hotel, designed with an idea of the five elements - Water, Earth, Wood, Metal and Fire. Equipped facilities include an executive lounge, restaurants, bars, meeting rooms, ballroom, latest fitness and spa experiences. SO Sofitel is located in the prime business and shopping district on Sathorn Road, with easy access to BTS, MRT and shopping area.  So this is an ideal place to treat yourself a Halloween feast with a stunning view of overlooking the whole city, and then go to the nearby shopping centers or bars to take part in those Halloween parties of makeup and dress. 
Sofitel So Bangkok Red Oven 
Red Oven Restaurant is the center of Sofitel So Bangkok, running with the concept of a world food market which provides all kinds of cuisine from Japanese and Thai to Italian and French. It offers the most impressive all-day dining set ups with well prepared dishes. 
Although it is set up like a buffet, this restaurant also serves a la carte options for those who aren't in the mood for multiple course dining.