There must be some site in the existence of the internet that has tried to fight the math and done a +EV game. haha.
actually, +EV games happen in land casinos. Not intended of course, but usually due to some math error combined with game rules/dealer error (and perhaps some unscrupulousness on the players part). There are a lot of APs (advantage players) who try to find these games and take advantage of them before the casinos find out. This was how Phil Ivey won the amount away from the casinos playing baccarat. Edge sorting.
I'm not sure Ivey admits to using edge sorting. The story I heard suggests that the dealer was colluding with him, placing the high cards upside down in the deck for him. That would probably be considered closer to "cheating" than "advantage play" wouldn't it?
Poker is the most obvious +EV game in land casinos. You're playing against other customers with the casino taking a rake, so as long as you're a good enough players that you can beat your peers and beat the rake, you make a profit.
Blackjack is another obvious example if you can find a game where you can count cards. I used to count cards at Bitcoin casino strikesapphire.com until they changed the penetration and banned me. Made a few hundred dollars, withdrew into five dollar Bitcoins and hedl.
And a third example is sign-up bonuses. If a casino offers you 2x your deposit as a sign-up bonus, it's often +EV if you play the right games. They often make you play through the bonus 20 times or something, in the hope that that's enough to make you lose it, but unless the edge is 5%, your expectation is positive even after playing through it 20 times. You need to do the math carefully, but it's possible to find +EV promotions.
Some places offer "no zero" roulette, where all bets pay out their actual fair odds. You get 36x for a single number for example. That's a zero house edge. I've seen it suggested that it's +EV for the house because people play until they bust, but I don't believe it. I think it's offered as a loss-leader to get new customers, and then withdrawn in the hope that they'll play "proper" 2.7% edge roulette.