Aliasalpha: Well I can understand playing poker (and caravan) for the fun/challenge and not specifically to win money, you have to build something out of your hand and you can bluff and strategically discard but what fun is roulette? A wheel spins, at the end your guess is either right or wrong and about the only strategy you can apparently take is whether you want to guess something unlikely or play it safe. Slots are even worse, your strategy is to play it or not
In real life there's several games you can reliably profit from. Video poker, Poker and Black Jack. I'm less familiar with craps, but I've heard that one is included as well.
And believe it or not, there are some slots that do pay out more than they take in to draw in crowds. You just have to look at the payout schedule and find one that adds up to something over 100%.