The only one I have found that actually does work is this. Open Scatter Slots to the hourly spin thing. Open your computer settings to the date/time settings. Turn off your automatic time setting. Play your round of spins to earn your free coins.
Change the time on your computer by a single hour into the future and save the changes. You are now ready to play another round. You can do this for as long as you like and it will keep letting you spin. Once finished, remember to turn the automatic time/date back on. The downside is this: Say you creep your time ahead to tomorrow at noon for example. Tomorrow you will not be able to play until the 1:00 hour (unless you go back and adjust your time settings again). You will still be able to do your regular game spinning, but not the hourly spins.

So here is what I do. In the evening, I play ahead for the sleeping hours and the following days work hours. Then, by the time I get home, I am ready to play normally.