The classy Sansei restaurant turns into a karaoke lounge late every Friday and Saturday night, but don't expect the anonymity of other establishments, where you can sing from the confines of your booth. Sansei has a stage in its main dining room, an emcee and a spotlight. The night we visited, our energetic host offered two free appetizers to the first duet of the night. A couple of dudes took the prize for belting out "Santeria." Don't worry, though, this isn't the Apollo. Sansei's customers—mostly locals in their 30s and 40s—will clap for anyone. One woman who somehow managed to mangle "Brown Eyed Girl" still got some love. The restaurant's late-night sushi menu is also 50 percent off.
Waikiki Beach Marriott, 2552 Kalakaua Ave., 931-6286. Karaoke from 10 p.m. to closing, between 1 and 2 a.m.