I think if you're over 18, and have a valid credit card (which they will pre-charge) it's OK. If you go to the Vegas Chamber of Commerce website, get the numbers from a couple hotels and call 'em. I don't think you'll be able to drink or gamble, but there's lots of other things to do in Vegas.
Depending on what the budget is, try Circus-Circus or the Frontier on the lower end, or Harrah's, Treasure Isle, or Bally's for somethig in the middle, or any of the new places (Bellagio, Alladin, Venetian, Paris, Mandalay Bay) for some of the more expensive places.
The Hard Rock Hotel is not on the strip, but probably caters to a younger crowd, and cab service isn't too bad or expensive.
If you stay downtown ("Glitter Gulch") the rates are pretty good. Try the Golden Nugget or Binion's Horseshoe.
Good Luck
Scott