Hilton Worldwide have announced the opening of its first Doubletree by Hilton hotel in Southeast Asia.  Celebrated during a special commemoration ceremony amidst hundreds of civic officials, business leaders and company executives last night, the 540-guest room, 34-storey Doubletree by Hilton, Kuala Lumpur rises high in the skyline of Malaysia's capital city within Kuala Lumpur's Golden Triangle district, just northeast of KL City Centre.