I like La Cantera, bought a watch and some shirts there a couple years ago.
From what i remember there was plenty of decent cover (fountains, trees, brick planters, brick buildings) and open air exit opportunities.
Step into cover/concealment, evaluate (smoke, gunfire, explosion, crash noises, angry yelling), look for an exit opportunity in a direction few others are going, plan to take care of any business that needs taken care of along the way.
People almost always try to leave the way they entered (example: infamous Great White concert). I always try to spot and make a mental note of alternative exits (including windows, to open or break) when I'm in any location.