There are two kinds of karaoke-goers: traditionalists “just in it for the music” and Axl-style mike hogs. Limelight suits both. More than 5,000 songs provide variety, and an always appreciative, largely tipsy audience supplies the right amount of Idol-esque egging on. (Those suffering from stage fright can “Sweet Child o’ Mine” it up in private studios modeled on clubs in Tokyo, where subtitled singing is practically a professional sport.) The food may be greasy and the drinks can be weak, but never having to share stage time with “Sister Christian”-loving frat boys is more than a fair exchange.