[SpiderKing]

I use this as a small gym bag or for short trips around my city.

It has a separate shoe compartment on the bottom used in the following settings:

-gym: basketball shoes
-salsa social: dance shoes
-concert: hiding a flask

AerSF Sling Bag 2

I picked up the older version, which is smaller than version 2 shown above. Also got it in gray, so it's easily spotted at night in the salsa socials / salsa clubs i frequent.

It'd be nice to carry a slimmer bag, or none at all. I find having a bag like this necessary due to owning a smartphone (requires spare battery, cables, plug, 10,000 mAh charger)

then throw in the following edc items:
-wallet
-shades
-keys and/or garage opener
-cigs + lighter
-knife + bear spray
-solid cologne (got tired of portable cologne atomizers evaporating over a week the way zippos do, but at least lighter fluid is only $5 a bottle)
-earphones

At some point its easier to keep all of it in one place, as Hank described. No need to load/unload your pockets on a daily basis.