I was raised to. Always sit to face the main entrance, identify potential exits, routes, obstacles, the nearest makeshift weapon both thrown and melee.

Identify fire hazards and choke points in event of Croud panic.

Clock each person as they enter or walk passed for weapons, intent, demeener, like someone who comes in who doesn't order anything, or isn't pay attention to the show and if focussing on other things, looking around, orders but doesn't eat.

Could be someone who's pissed off and might hurt someone for no good reason, or just someone who doesn't feel safe.

Locate nearest AED, Bathroom, Water Source, Fire Extinguisher...

All of that. My dad does it as a choice, he taught us to do it, but because I grew up with it, I can't not do it. It's honestly a source of a lot of anxiety. I ended up leaving a football game at my old highschool when I was a guest alumni because of this. Too many fire hazards, the exits to the stand are a funnel that leads to a place people could easily get pinched and stuck and crushed, let alone prime location to be mowed down. Field exits are only two unless you can climb the 5ft, or higher at places, fence.

I hate driving with fucking hills around on either side of me because I'm stuck thinking of my dad saying, "would be a great place for an ambush"

Like fuck's sake, I shouldn't have to use fucking anxiety tools just to eat at a fucking diner, or go to a mall.

But it caused me catch and help someone suffering a stroke early, so it has its benefits....