A dull property market took a toll on Vikas Oberoi's Bombay Stock Exchange-listed Oberoi Realty, knocking him out of the billionaires' club. The cash-rich firm, which reported slowing sales in its home market of Mumbai, is looking to expand in Delhi and Bangalore through joint ventures. An upcoming midtown project includes a 210-room luxury hotel for which he's tied up with Ritz- Carlton after discussions with Mandarin Oriental unraveled. Oberoi recently sold shares to bring down his holding to 75% to comply with stock market rules. He's started taking guitar lessons mainly, he says, to get his 2 sons interested in music