As an expat Aussie, I almost felt like it was my duty to seek this place out and have a drink. The interior looks much like an average Aussie Pub, somewhere you might wander in for a counter lunch or stop off at on a long road trip. They have a pool table, a TV room and various Aussie paraphenalia around the bar. The regulars aren't necessarily Aussies themselves, but an eclectic mix of blow-ins, drunks and hardened expats. One thing is for sure, they make you welcome and treat you as one of their own in no time.
They have Australian beer in plentiful supply and also all the traditional Aussie pub cuisine. They also show sporting events such as AFL, cricket and rugby. It's only a twenty-five minute ride in from the airport. On my second visit to Udon Thani, I just had a three hour layover - just enough time to head into town for a beer and a pie.
The official closing time is 1am but this is not a rule - more just guidelines (if you get my drift).
Harmony Bar have a relax atmosphere where you can drink and eat. Sometimes there is live music. The hamburger is fantastic.
The girls are not hassling for drinks etc..