This Thrillist article provides some additional ideas for your upcoming visit to San Antonio for the Annual Congress - enjoy!
https://www.thrillist.com/lifestyle/san-antonio/things-to-do-in-san-antonio
Shopping
La Villita Historic Arts Village →
La Villita, south of the River Walk in downtown San Antonio, was originally settled nearly 300 years ago as one of the city's first neighborhoods. In 1939, La Villita Historic Arts Village was established and the neighborhood was adapted into a center for teaching regional arts and crafts and to serve as an artists market. Today, nearly 30 shops and galleries offer distinct handcrafted items by artists from San Antonio and surrounding areas. You'll find paintings, folk art, textiles, sculptures, copper wares, jewelry, and more. Plus, in the midst of these tree-lined walkways and plazas, enjoy a savory culinary experience at the area restaurants with options ranging from traditional Mexican flavors to steakhouse favorites. For individual shop listings go to http://www.lavillitasanantonio.com/.