Towering black-and-gold rectangular doors open into this lavish bubbly palace co-created by Elton John's partner, David Furnish. Silk-covered walls are hung with photographs from the couple's personal collection. Slide into a moon-shaped, cream-colored leather booth, then peruse the menu of champagne by the glass and high-end fizzy cocktails, with canapes and caviar on the side. Upscale dress recommended.