I have heard comments in the past that people have had issues carrying in J-ville. Nothing horrible, but just cops not minding their own business.
On the other hand, I've NEVER had a problem, and I carry there at least every other weekend. I've open carried damn near everywhere I legally can in J-ville without incident. I have been at restaurants at the same time as LEO's without issue, as well.
From my personal experience, I'd say J-ville is at least open carry neutral, if not friendly. Either way, go for it! lol