How do I go about dating in Vietnam (Saigon)?

I just moved to Saigon a few weeks ago for work. I didn't come here with the expectation of dating, but I'm certainly not against the idea. I have been hanging out in a bar in district 1 most of the time. It's close to the house and a nice place. As with many bars around here, it caters to a mainly ex-pat crowd. And, as with many bars here it is staffed with very cute girls. There is one girl in particular who seems to make a point of ignoring the rest of the clientele when I'm there and talks to me most of the night. Now, I'm a little skeptical of this situation. Not to be insulting to anyone, but I am quite well traveled and I have been many places where the women feign a serious interest in you under the orders of the bar owner to drum up business. It doesn't seem like that sort of place, it's pretty much all regulars, who are long term working ex-pats. But, I don't know Vietnam very well yet. Her interest seems genuine, and even if it is, I don't know if it would be proper to ask her on a date. We're about the same age, (mid 20s), so I'm not a delusional 50 year old looking for a girl far too young. Some help would be appreciated here. Maybe some etiquette advice and some idea if the "flirting is part of the job" mentality is prevalent here.