Figure out how to play craps - it's more layed back and cheaper table limits downtown. When you see the Fremont Street Experence . . . . . .
Craps is a good game where a little luck with the dice can go along way. Study up and the dealers will help you win . . ..
There is more to do in Vegas then you will have time. Check out some of the casinos off the strip, Palms, Rio ect - they have good shows and great buffets
Some of the casino's on the west end of the strip offer all day buffet pass. It's really not a bad price ($25 bucks on up). A harty breakfast, a great lunch or snack (ice cream, non-alcohol drinks, other deserts, in addition to lunch) and then harty supper again.
Golf - if that's your thing. Out at one of the ritzy resorts south west of town. . . .