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Roulette is a game of pure luck and there is no strategy to overcome the built-in house percentage. Although various card games similar to what we now know as Blackjack had been played in other countries for many years, Blackjack did not make an appearance in American casinos until a few years prior to WW I. Played as a private game until around 1915, Blackjack was known by it's French name of Vin