Ya'll going for Essence Fest this weekend? Sadly, most of the businesses actually close on Bourbon for that festival.
Check the Louisiana pinball thread started by PinballHelp. There is both a barcade in New Orleans, Goldmine (which will probably be closed this weekend), and then the church that PinballHelp refurbished into what looks like the best pinball arcade in the state now (I haven't seen it in person yet sadly).