I have never been and have often wondered what is the attraction. I went to Maccau once, saw similar silly casinos with gondolas in indoor Venice malls, Packer's City of Dreams etc etc. To me it was like 20 Westfields with gambling.
What is different about Las Vegas ?
Well its unique as its nothing i have encountered before or after during my travels.
So entering Vegas via bus coming from LA about an hour leading in its just desert around then all of sudden you hit Vegas and its casinos everywhere down the main strip. Flashy buildings lighting up. Water fountains and that.
You walk into a casino there is gambling tables everywhere. The way they light up the inside parts of casinos as you walk through just doesn't feel like reality. You wouldn't know what time of the day it is if you just stayed inside.
You have the tram line that takes you along the strip. Basically casino hopping if you don't walk in the heat.
At the Flamingo you walk past the habitat on the outside but its inside the casino like your at some zoo or aquarium.
Shops pop up everywhere as you walk through casinos as with plenty of bars.
I went to a VIP party which was part of the tour i was on basically was a nightclub involving a pool party with DJ music. I assume its not the only city that has that but fmd that night was out of control didn't get back to the room until 5am and Origin match back here in Australia had just finished so i missed it.
You spend $50 US dollars on high quality vodka/spirits in some places.
Each casino has a different theme about it on the outside and inside.
It may be 3am or 4am but the strip is still buzzing 24/7.