At most local bars, karaoke seems like an afterthought or off-night lark aimed at bringing in bodies when it's ordinarily dead, dead, deadski. Not so at The Grapevine in Old Town Scottsdale, where the spot's nightly singing sessions in the downstairs bar are its most popular attraction. Grapevine's proprietors fully embrace its rock-star status as a karaoke destination and offer a fun, come-as-you-are atmosphere, where a diverse crowd croons an equally diverse variety of tunes. KJs (or "karaoke jockeys" for you rookies) James, Monica, DJ Rey, and Frank are your affable hosts and can suggest something from the 400-page songbook if you can't decide. They might even join you on vocals, as will the bartenders, waitstaff, and other patrons, particularly if it's a crowd-pleaser like "Don't Stop Believin'" or "Bohemian Rhapsody." If you're eager to grab the mic and step into the spotlight, things get going at 5 p.m. Monday through Friday and at 3 p.m. on Saturday and Sunday. Talent is, of course, optional, but enthusiasm is always appreciated.