Rent a car, and drive to Henderson, Laughlin, and all of the casinos around the Las Vegas area! There are 150+ casinos to go to and pick up casino collectables (and you won't spend one dime in front of a slot machine). Once you sign up for a slot club you get a better benefit, casino junk mail with good offers in rooms/food.

If that doesn’t float your boat, there are plenty of museums in Las Vegas

Oh, one other thing, Las Vegas is the capital of “people watching”. Who knows, somebody famous might just walk by.