For my 30th, I went with about 10 friends to Vegas and we had a weekend party. My actual birthday was on Monday I think, so by the time that rolled around it was time for the "nice dinner out" portion of the trip. But before that, we managed to have all sorts of fun.
Some things you can do in Vegas that most people don't usually think of:
Rent exotic cars and drive them as fast as you want out in the desert.
Extreme sports like Bungee, skydiving, racing, shooting ranges, etc, etc are all a quick drive away. Check out those tourist places on the strip for great ideas on those.
BTW...indoor skydiving (a huge fan) is also something they have there.
Plus..there are all the stupid things you can do in any other town. Tattoos, bars, etc, etc.
And...of course, what happens there stays there.
