A room with a view is old news. Right up there with “location, location, location” is the truism that stunning vistas—especially from public spaces for socializing and relaxing—make a hotel a destination. But some new hotels, and some classics, are upping the ante. Their bars are designed to maximize views so extraordinary—scenes you’d hike miles to take in—that the bar becomes secondary. That flute of bubbles or high-concept cocktail seems almost (but not quite) beside the point.