Knet Karaoke, San Francisco

At Knet Karaoke, patrons can take the mic any night of the week. And they won't have to suffer through a stranger's rendition of "I'm a Little Teapot," because karaoke kings and queens perform in their own private chambers. Behind the crimson door to each room, some of which hold up to 22 people, low banquettes offer cozy seating and glossy tables reserve noshes chosen from the menu. Wireless microphones enable performers to work the room, dancing to the melody or crowd surfing to Hilary Duff's rock hits.