How do you sing well in a noraebang if you're not a good singer?
You've come to the right place on this one. I've got to be one of the worst, most tone-deaf singers ever, yet I used to frequent the places somewhat regularly. The following advice is actually more what I used to do to cover my horrid singing skills.
Sing very popular songs...
If you sing a popular song it usually means a lot of other people are going to get into it as well. You should also shoot for a loud one so you can blend in with the others. We used to always sway in a big group while the mic was passed from person to person. I made sure that the mic didn't stay in front of me for too long. Under the Bridge should suffice even though it's kind of a mellow song. Everyone knows the words whether they want to or not.
Sing songs that you really love...
If you really love a song and have listened to it thousands of times, then you can usually mimic the voice pretty well. I love the Grateful Dead and I can mimic Bob Weir's voice quite well, so when I'm singing in the shower, Cassidy usually comes out. However, Korean noraebangs typically don't have Grateful Dead songs, so that doesn't work for me. Hopefully, your favorites will be in there.
Look for easy hooks...
Songs with simple hooks are perfect. I'm not talking Heat Wave here, but some songs have hooks that aren't that easy for bad singers. I usually go for "Night Moves".
Rap and hip-hop...
This brings up another set of challenges for me. I can't keep up with the speed, but some people can really nail it. If you've got good rhythm and know the words, go for a rap song. Your speed alone might be enough to dilute your poor vocals. Most noraebangs have "Changes" by Tupac which seems to be the only one I know.
Be the tambourine guy
I know it's lame, but sometimes tapping or even clapping is just easier. It worked for the sax player in "Dancin' in the Dark".
Bust out the moves and minimize your time on the mic. Not only will people appreciate the show, but you can showcase some of your badass and long-retired dance steps. Maybe a little "Jam On It" by Newcleus?
Hold a bottle of beer or soju and encourage everyone to drink with you. Drunk people don't care or remember how bad you might have sang "Piano Man", but they do remember how much fun it was.
Who the f*ck cares?
Who cares if you sing well. Unless you're trying to impress a boss or a potential partner, you're there for fun with friends. Let loose and shriek Queen as loud as you can.
And now for my favorite noraebang song (which doesn't work with my voice at all)...
Fun question. Thank you questioner "Marsha G".
Anybody have any more advice or personal favorites?