Vegas gets pretty boring after a couple of days. It will be winter there, too, so you can’t even sunbathe and look at the talent.
There’s some cracking landscapes outside Vegas. Hire a car and drive to red rock canyon or Death Valley. A helicopter trip to the Grand Canyon is great too.
Vegas is just a big shopping/gambling centre really, it doesn’t have much value in terms of culture. Alternatively, just take shit loads of drugs, and marvel at how weird it is to build a city in the middle of a desert, and it’s colossal environmental impact meaning suffering for the next generation on a biblical scale.