I read this article on Vegas Chatter and saw a comment regarding sticking it to the casinos on 6/5 Blackjack by treating Blackjacks against a dealer bust card (4,5,6) as an 11 and doubling down. See the link to the story below. http://www.vegaschatter.com/story/2015/5/7/155255/2361/vegas-travel/A+Tale+of+Two+Blackjack+Payouts+at+Downtown+Grand Now, let me preface this by saying that I will not normally play 6/5 BJ as a matter of principle, but I will sometimes play 6/5 BJ at low limits or party pits with friends on a tight budget for fun. I know I shouldn't do this because it perpetuates the 6/5 BJ, but sometimes I just want to enjoy the time at the table with my friends. With that being said, from a mathematical perspective, would it make sense to double a blackjack against a dealer 4,5, or 6 at a 6/5 BJ table?