AIS Design Centre (AIS D.C.)

One of the fastest wifi speeds I've ever seen in a public place. I recorded around 600 mbps Wifi Speed. However, you'll need to subscribe for a yearly plan or a daily pass, its 150 THB for a daily pass or 1400 THB for the year, which gives you unlimited access. The only downside is: The temperature! It can get dreadfully cold out there. Make sure to bring a couple of layers of sweaters, my fingers were hurting typing on the keyboard at some point.