i had to add one more i found here( http://www.bigempire.com/vegas/gamblecheap.html) about their penny slots:

Western - The Western houses a few penny machines, but playing for pennies really doesn't justify the trip down murderer's row it takes to get here. Only plan to use these machines if you're going there anyway and the pennies would have slowed you down when the thugs chase you out of the place.