In New Orleans and surrounding area, vaping in bars is ok ( smoking is ok too) in bar/grill vaping is allowed but not smoking due to food being served as more than 50% of the business.
As far as hospitals... down here its a definate NO as far as smoking ( not even in the parking lot but they dont enforce it tho) I did manage to vape ( stealth) in the hospital... the nurse came in the room and asked me what flavor I was doing ( I suppose I was "caught" by her) but she had no qualms about it going on in the room....
New Orleans is awesome and seems more "free" than other places. I'm proud to say I was born there and my sister lives in Metairie.
Happy Mardi Gras.