You might try checking out the bar and cafe pages under "Top Spots" here on the site, or you can go to the "Groups" page and start a group for the expressed purpose of finding people and places for hanging out.

Thanks a lot!
I checked it out, this site is really nice.
Yesterday evening, in my search for some places, I found some useful information, wanna share some with all of u (some might knew about it already)
http://vinacarta.com/

Actually I usually go to 17 saloon (I call it my favorite place) I dont know if many people like it or not, Im not crazy for it but I hav no other choice.
Other places, I tried before (few years ago) and recently but I found them not interesting at all. Do u agree with me?

I guess that 17 saloon is not very beloved. It's quite boring there because the music is so loud. FM3 in Duong Thanh street is right now the biggest disko in Hanoi, wanna try?