Guam allows open carry.
You don’t see it very often but it is allowed.
I was in store the other day and the guy in front of me at the checkout had small automatic on his belt.
Legal, I saw the same at central New Hampshire restaurant.
Seated, with the small automatic exposed and tilted out, it appeared like a tempting "snatch" for a felon.
My state Pennsylvania also allows open carry. Very rare that you see anyone open carry though. I work in New Jersey so I usually don’t carry at all. But I do shoot a lot, compete in competitions mostly steel challenge and the like. I consumed 11K rounds of 9mm so far this year that’s over 1000 rounds per month.
PA allows both open and concealed carry, with a permit required for each. I open carried on my nursery/gdn ctr, but I wouldn’t do it publicly, and only carry concealed. I carry a full-sized Kimber 1911 .45cal ACP w/ 230gr HPs.