Selling and/or drinking alcohol at children's events
Birthday parties, Little League games, school fundraisers, you name it, there's booze there. Everywhere else in the country, they sell cookies and lemonade... but in New Orleans, it's highballs, craft beer, and someone's uncle's infamous "jungle juice." Can you imagine what would happen if they sold beer at kids' sporting events in, say, Boston? You'd wind up having to call in the National Guard. But if you attend a child's birthday celebration here, parents will get downright irate if there isn't hooch readily available.
Casually referring to people, often complete strangers, as "baby"
No, they're not hitting on you. Everyone in New Orleans is "baby" or "dawlin'." Male or female, young or old, it doesn't matter.
Jaywalking with panache
In the words of one local, "New Orleanians have an innate talent for casual jaywalking with a certain flair. I can often tell whether someone is local or not by the way they jaywalk. Tourists are hesitant and nervous. New Orleanians strut."