Frommer’s

This special little place is deep in the heart of Chinatown, only 5 minutes from the railroad station, and a stone's throw from the river. It is not particularly comfortable, but the atmosphere of the busy neighborhood and nearby Chinese temples and shops (and, of course, the river views) attract visitors in search of an immersion experience. Part of the appeal is that to get here you'll have to wander through the neighboring sois, lanes, and labyrinthine alleys. Rooms are nothing special, just guesthouse basic, but some have great views and dining at their rooftop restaurant is an experience in itself.

Note: Be sure to grab a business card at the front desk so you can find your way home once you've checked-in (dropping breadcrumbs won't quite do it).

http://www.frommers.com/destinations/bangkok/H1709.html