Hilton Worldwide has announced plans to open more than one hotel in Mecca, Saudi Arabia, as more religious pilgrimages spur demand for accommodation in the kingdom, Bloomberg has reported. 'We don't have enough of a supply of hotel rooms,' Shuja Zaidi, Hilton's vice president of projects in Saudi Arabia. Jabal Omar Development Co., a real-estate developer in Mecca, is building 27 hotels with a combined 15,000 rooms, with the first to open in 2011.