If you are in the mood to try your luck (and not lose any money) then check out FreeSlots.
FreeSlots is a collection of over 30 slot and video poker machines that you can play in your web browser (nothing to install). The colorful graphics and machine sounds will make your playing experience as realistic as possible. Once you’ve racked up some credits, press the cash|credit button to enter the monthly sweepstakes for a chance to win real cash! Personally, I will stick to just playing the machines.