A River Walk standby set in a turn-of-the-20th-century building with a handcrafted mesquite bar, this self-styled Texas bistro is known for its chunky guacamole, made tableside with fire-roasted tomatoes and serrano chiles, as well as for its lively atmosphere. Tex-Mex and Gulf seafood made with fresh local ingredients are the menu stars. Start with the guac, and then try the shrimp and grits, made with chorizo and roasted poblanos; or the prime rib, cooked on a pecan-wood grill. If you get the lighter herb-crusted fish fillet you might have room for dessert: whiskey-soaked bread pudding, say, or Key lime chess pie. For the ultimate San Antonio experience, book a Boudro’s Dinner Cruise 2 weeks in advance, and for $60 per person (not including tax, tip, and spirits) you can dine on a delicious prix-fixe menu on a barge floating on the river.