Airsoft looks like an expensive hobby, and it's more limited about where you can play. Running around while awkwardly holding your smartphone makes you look stupid, but nobody will call the police because they didn't know the orange tip means it's a toy-gun.
As far as fully physical play-simulation goes, paintball is probably the most fun. I never played real paintball, but i did play a few matches of a budget-variant that used 2 types of slingshots, one with elastic-rubber bands for small paintball-pellets and a traditional centrifugal rope slingshot that you spin over your head with slightly bigger paintball pellets. That was great fun and comparably cheap since renting slingshots is much cheaper than renting compressed air paintball gear. Slingshots don't impart as much kinetic energy as compressed air, and that means that you don't need protective gear other than for your eyes/ears. You can get away with diving goggles and a headband.
Paintballs are biodegradable and dissolve in water, so rain will clean up the mess but many places require permits none the less, some places only allow for it in dedicated areas that have organizational oversight and safety instructors. That's one advantage all the augmented reality shit has going for it, it's zero fuzz.