Tamajun (or the Rabbit bar as we call it) is situated right on the river and it serves German beer (much to Mr John's joy), good Thai and semi-western food and has live music at the weekend. The toilets (which are sit down) even have a small waterway running through them with small fish - so you have something to do whilst you're sat there.
The staff are friendly and welcoming, though the level of English spoken varies. The bar opens at 5pm and there's also free internet. On Buddhist holidays, no alcohol is served. We tend to use this bar as a bit of a treat to ourselves and only really go once a month as, by local standards, it's quite expensive.