There are a few machines peppered around in the NOLA area. I haven't checked recently but there's 3-4 at a Frostop on Jefferson Highway.
We have formed a club in the NOLA area called the "Mystic Krewe of the Silver Ball". We have a space in the area that houses what we think is the largest collection ever of pinball machines in Louisiana. More than 50+ at this point. We're doing a tournament downtown at Barcadia July 27th and sometime in August we'll host one at our "PinChurch" -- we ran a tournament a few months back and had live music and a food and drinks and everyone had a good time. If you want to find out more about our group, see: http://MysticKrewe.com/ Our focus isn't exclusively on pinball... we are also doing educational projects, hacking and makerspace things, and generally teaching each other new skills and working on group projects as well as host pinball gatherings and other social events.