One advantage to Vegas if you have a car is that you aren't far from a number of attractions such as the Hoover Dam. You can even take a short trip to the Grand Canyon from there.
One cool thing to do in Vegas is the Fremont Street Experience in downtown Las Vegas. At night there is this cool light show. A word of caution though: Downtown Las Vegas has had its share if crime. If you drive downtown, park as closely as possible to the light show and don't walk anywhere alone.
I got the impression that Vegas gets a lot of the “Hip Hop” crowd there.