LAS VEGAS

Fueled by a building wave, Las Vegas is taking off. With the openings of Stratosphere, Monte Carlo, and New York-New York, gamblers, conventioneers, vacationers, incentive winners, and everyone else who rolls into this southern Nevada mecca will have more than 100,000 hotel rooms from which to choose by the end of the year. And construction continues. Bellagio, Las Vegas's biggest construction project, is a 3,000-room, 37-story resort and casino orchestrated by Mirage Resorts' gaming