If you speak thai nitnoy, you will be able to help yourself or let them help you, try visit the karaoke near the memorial hospital, manager speaks english, drinks and food are cheap, or the karaoke behind the nightmarket (jj market) they also have a fishbowl-massage there. You don't know if you are welcome in a bar, so, ask when enter. You will notice it also if you go sit down somewhere and order a drink, if not welcome they will not serve you. If you have a thai neighbour or friend or well know taxidriver, ask him to join you first time, once they have seen you before makes it easier to go again. I heard of farangs had problems there, but for myself i never had any problems.