At a time when bank accounts and stock portfolios are draining, the high-end hotel business might be expected to be losing its fizz. Not yet. While occupancy is down slightly as room count rises, rates and room revenues are up. And new luxury lodgings continue to pop up like bubbles in a glass of Champagne. Lower-cost quarters at upscale hotels are being booked less frequently, say hoteliers, in part because of reduced business-travel budgets. But suites and rooms with a view are selling, as the industry woos younger guests in addition to the older well-heeled set with Architectural Digest-worthy design, high-tech bells and whistles, haute and happening lounges and the VIP insider experiences guests increasingly expect.