Step through the front doors into the 25,000-sq.-ft. ballroom, frosted in marble from floor to ceiling. Drop your jacket at the electronic coat rack rotisserie and head up to the black catwalk that runs across the room. You could climb one of two staircases, but why knock yourself out when there's a glass elevator? The opulent hall (which cost $3.5 million alone) has already hosted hundreds of partygoers at soirees and fundraisers.