Mah Book Krong (MBK)
The MBK centre was once a popular hangout with the young Thai in crowd, or so I'm told. These days it's apparently more oriented towards tourists, but still has a range of goods, including a large mobile phone section, in a moderately air conditioned six floor mall. As per usual, it's topped off with cinemas at the top - tickets are around 120 baht in general. Internet is available on the fifth floor, beside the video arcade. Exits through the department store go directly to the National Stadium BTS station.