If you're a cocktail geek, there's a good chance you’re visiting town just to worship at the feet of Jeffrey Morgenthaler, mastermind of the bar programs at Clyde Common and Clyde's subterranean sister, Pépé le Moko. At Clyde, Morgenthaler's famous barrel-aged cocktails dazzle, but downstairs, striking a balance between seedy (no windows) and stately ($$$), the star of the show is, implausibly, a $14 Grasshopper. Pépé's boozy chocolate-mint shake is rounded out with Fernet; it's a beautiful 1950s-kitchenette-backsplash green. Don't overthink it. THOMAS ROSS