Let me just add this to those who PM the 河内四大天王，please read the rest of the thread before posting. Valuable insights and advice is shared from the start. I began in Ha Noi this way too. Sitting in a cramped, unairconditioned hotel "business office" hooking up to the net with a dial up modem trying to get to SBF.
Getting your info, share it via a FR. However, I don't post FRs personally because of the same problem that Naemlo is facing right now. I should do so in future, come to think of it, and just ignore some of the more meaningless PMs that come in. Just like I have been ignoring some already.
When you're going to Ha Noi, if you can have a bit of spare time, meet the Big Four. I've tried to meet the famous Deptrai before but our schedules didn't match. He's harder to meet than Obama and the Pope put together
If you can have time to cheong, take time out to meet the Big Four who will no doubt share more info with you when you meet them in person.
Don't be a standard issue Sillyporean who only wants to take, feels entitled to take and give nothing back. Worse, complain and whine like a prepubescent girl when things don't go your way.
There are "safer" options than Lien Tri (the ones I go to are in Giang Vo according to my suppliers. I don't remember much except that I wake up with women I don't recognize, in hotels I don't remember going to) such as Boss (Fortuna Hotel, Lang Ha street). Where you can get your small head excited and your carrot head chopped off. Remember then that if you want to really enjoy local KTVs, being able to speak Vietnamese is important. Try Cambridge Language School for 10 lessons at $400 at Peninsula Plaza.
Finally, remember that one has to kiss a lot of frogs to find a prince. Not every KTV is "good" (cheap booze, good service, hot chicks and budget fucks) but the journey or the process to find one is where the fun is. No aunty in a market she doesn't frequent buys the first bag of fishballs at the first store she goes to. Walking around, checking out the goods, asking questions and bargaining are part of the process. If one is open minded enough, part of the fun.
I've said my piece. Sorry to ramble on.