The show sure wants to make sure that we know they are in New Orleans. The characters are constantly telling us how NO is special or giving us some witty NO proverb.
My mother in-law was born in New Orleans and raised in Louisiana. Plus I lived in Baton Rouge for nearly a year.
Believe me…I've seen dialogue like that with my wife's family, people familiar with the city, people I knew down there, and even with the MiL once in a while when we were still in DC.
Besides, most of those dialogue were geared toward the characters new to New Orleans.