Endeavoring to stay true to its speakeasy concept, the most important thing to know about the after-hours spot Libertine is how to find it. Look for a blue (but otherwise unmarked) door with a blue awning over it. While the exterior is nondescript, inside is anything but. Libertine channels a turn-of-the-century London vibe, with a warm wooden bar, white marble fireplace, and a wall full of books: old-school library style. Equally timeless is the cocktail menu, which makes use of seasonal ingredients to give fresh spins on classic cocktails.