LOS ANGELES Known for its Hollywood launches, T-Mobile is heading a few miles to the northeast to launch its Sidekick LX phone. The Clubhouse at Griffith Park’s Harding and Wilson golf course in Los Feliz will set the scene for tomorrow night's party, which will feature a vintage fragrance counter where guests can customize their own scents, as well as a mock dive bar. An artist will create custom sketches, and a photo booth will offer quicker portraits of those darting out to another engagement. (It is Fashion Week, after all.) DJs AM and Steve Aoki will spin.