If you’ve ever wanted to sip on an old-fashioned set afire by a master mixologist in the renovated venue of the 1992 NAFTA initialing ceremony, have I got a spot for you. A plaque commemorating the North American Free Trade Agreement, which was initialed by President George H.W. Bush, Mexican President Carlos Salinas de Gortari, and Canadian Prime Minister Brian Mulroney, is an unobtrusive centerpiece in the courtyard at the brand-new Kimpton Santo, in downtown San Antonio. The live oak–ensconced plaza is situated directly between the hotel’s steakhouse and its vibe-y, high-concept speakeasy, the Study at Dean’s.The Kimpton Santo, the third Kimpton location in Texas (adding to the Pittman, in Dallas and the Harper, in Fort Worth), has been open for less than a month,…