I think of these two cities as Satan's playgrounds within America. LV is called the City of Sin for good reason. NOLA is different but the same...a place drenched in debauchery and of course the voodoo is clearly satanic. I'm not saying that either city is 100% evil, nor that other satanic thrones don't exist in America, but I just think of these two cities being linked in that way, that many people regularly visit them just to immerse themselves in a sinful atmosphere. My 2¢.