When Everyone is Super: a Miniguide to Classless Damage Boosts
The Mind's Eye: a Psion Handbook
Bladesingers a-go-go: a list of my Bladesinger builds
The Comprehensive Guide to Alternate Goals in Combat
Depending on the edition/era you're wondering about, there are a lot of places that could work. My own opinions would be gravitating towards Suldophor (Arnarden/Lake of Steam), Athkatla (Amn), Manshanka (Calimshan, hope I spelled that right), and maybe Hlondeth (Vilhon Reach), though that last one stretches things a bit. I'd disagree about Waterdeep and Silverymoon though, neither are exceptionally corrupt, nor all that centered around tourism or gambling. Certainly gambling halls exist in both, but that's like saying Petaluma, CA is like Vegas just because it has a casino.One could make a case for Arabel I suppose, with the dominance of the Church of Tymora there, but last I looked they were more the adventurer-friendly sorts rather than the games-of-chance sorts. But my own gut instinct says that the Church of Tymora wouldn't really have that much of a presence in a Vegas like place given casinos tendencies to stack the deck in their favor. Conspicuously garish displays of wealth, a strong tendency towards decadence, and a deep disparity between the haves and have-nots would tend to favor the southern realms of Faerun more than the northern.
"Be careful to choose your enemies well. Friends don't much matter. But the choice of enemies is very important."
- Oscar Wilde
I guess it depends on what you mean, if you mean like colored lights and stuff id say Menzoberranzan
I haven't read the Menzoberranzan Book but I don't see the that city in any Light of Vegas. If you are not Drow you better have a good reason for being there, Death and Slavery are the only things you might find.