I have a few tips for you on Vietnam, other than only drink bottled water. First, you'll see karaoke signs on most of the hotels. This is a euphemism for prostitution. Most hotels have a staff of girls that offer massages. If you actually want a massage you'll be disappointed because they only really try to massage one part of the male anatomy, even if you really do just want a real massage.
Some places do offer karaoke singing but girls come sit with you and you'll get charged for their time with you, their fake watered down drinks and the songs you sing. A friend and I merely sat down had a coke each, bought two girls a coke and sang a couple of karaoke songs together. We were not allowed to leave until we paid $50 US each!
This was all ten years ago so things may have changed. Just be careful over there, Brother!
Vietnam IS a beautiful country. I would gladly go back and visit again! There is a wealth of history and color all around. Enjoy it to its fullest. I just want you to be safe!
RE: Don't Die Waiting - Eleven Weeks, Two Kids And One Wife in Asia (Day One)