Today's duet selection, which should get some good smiles--and a partner to sing it with!--around the bar is Pink Lady. Your parents might know these gals, as they at one point had an American TV show (wuuuut?). So I'll show you their first American TV appearance, complete with a song that you can probably use at said karaoke bar. Avoid imitating all hairstyles herein though.
Just like yesterday I feel the need to double up on duets. Here is a Japanese one by them, called Uonteddo (Wanted). Again, avoid hairstyles--and clothing for that matter-- in these videos.