Bar Diane is a natural wine bar and kitchen hidden down an alley in Northwest Portland, paying homage to cosmopolitan Parisian café culture. While technically a modern wine-focused establishment rather than a traditional speakeasy, its unmarked alleyway entrance across from Cinema 21 certainly gives it that secretive appeal. The aesthetic is distinctly stylish with bright patterned murals, a cerulean blue tiled bar, and lemonade-pink chairs. Bar Diane specializes in natural wines, champagne, and spontaneous fermentation while maintaining a focus on sustainable viticulture and skin-contact wines. Open for dinner nightly with caviar service available, this is an upscale spot for wine lovers seeking a convivial atmosphere that balances cosmopolitan sophistication with neighborhood charm.