In Poker rooms you can make money even if customers win money. In casinos only if they loose (which is the case most times.) The best new product that i found where you can earn some cash even if the customers win is Foreign Exchange trading. The great thing about it is that its a mainstream business (i.e financial institutions) and this means that its legit, regulated and unlike online casinos, nobody is trying to ban them. Another cool thing is that its a fresh product ... and there is not much competition in promoting this kind of services. Plus its pretty much like gambling because the forex market is pure speculation. Its a guessing game. If you want to learn more take a look at this site which is the one i am promoting:
www.easy-forex.com and it's doing very well for me so far.