Vegas baby!
I had the pleasure of spending some time there a few years ago. I'm not a big gambler myself, so most of the time my friend and I just wandered around from casino to casino checking out the amusement park atmosphere.
If you're a Star Trek fan, check out the Star Trek experience at the Las Vegas Hilton - it's a great interactive attraction.
For a great view of the entire city, be sure to take a ride to the top of their "Eiffel Tower" and have a look.
New York New York is a really fun spot, especially for a New Yorker, Thier rollercoaster is a lot of fun.
Luxor is a really cool hotel. Ditto for the Venetian, Mandaly Bay, and Excalibur.
There are lots of rides and shows at each of the casinos and hotels, so you really don't have to gamble if you don't want to.
Oh, you can drink on the street there. That's what really made me fall in love with Vegas.
