Per madadmin:
To my knowledge any place open carry is allowed there is no permit needed.
I actually prefer open carry to concealed.

Maybe it's different in the Western states where normal people carry
firearms in public.

But here in Southeastern Pennsylvania (about 23 miles West of
Philadelphia) I feel more at ease when people are carrying their weapons
out of sight - i.e. I am not aware of their presence.

When I see somebody with a Glock on their hip walking around in plain
sight and no badge, all I can think of is "Is this nut case going to
*do* something or is he harmless?".

Ignorance can be bliss - or, at least, freedom from anxiety...
--
Pete Cresswell