At first glance, Koji Kanazawa looks like any other desk-beagle: neatly pressed gray pants, white shirt and bland tie topped off with a bashful, almost apologetic bow.
But as the 24-year-old advertising salesman steps off the streets of Roppongi thronged with pamphlet touts and red-faced bar-hoppers, and into boisterous Salsa Sudada, his mood -- in fact, almost his entire persona -- changes.
After ordering a drink, he approaches one of the young women perched at the bar. Tucking his tie into his shirt, he politely takes her hand and leads her through a mass of hip-shaking, twirling bodies before launching into a flurry of spins, steps and flirtatious looks with this complete stranger.