The Las Vegas Ceasar's Casino doesn't offer the chance for people to earn free coins. However, you may be offered complimentary free coins in the proximity of the casino, should you be lucky enough to find yourself amidst a promotion day. As a general rule of thumb, though, it is not many Las Vegas casinos that offer people the chance to try out their games with real money for free. It is a much more common practice in Atlantic City, though, where you may be offered free cash that you can spend on the casino.