Once upon a time, Downing Street Ltd. was the hangout for local politicos, trust-funders and single yuppie guys. The crowd has changed a bit -- there are more scenesters and social climbers these days. But most folks flock to this River Oaks lounge to simply enjoy the cigars, premium Scotch, weekly jazz and elegantly casual vibe. The 400-square-foot humidor is the spot's centerpiece, a marvelously crafted mahogany cigar shop. Step in and find your favorite stogie -- there's Zino Platinum, Arturo Puente and Greycliff for aficionados (many store their own cigars here), and Davidov and Macanudo for casual enthusiasts. Light up and kick back in a booth or on one of the plush leather couches. For the full, regal experience, nurse your smoke with a sip of 25-year-old single malt.