i do not read the previous posts, but if any one asking for cheap and unique hotel maybe you can try a hotel called "Take a Nap" which located @ Silom Road and it is very convenient.

Take a look http://www.takeanaphotel.com/map.php

Their room consider quite unique every room with single design, lots of mat salleh and taiwanese stay in this hotel when last few months i went bangkok during their protest period hehe luckily i still here.

Have fun guys.