I just found out about this game. Four Queens is the only one in Vegas that has it at this time. It has a twist to it as you play two hands at a time and may switch your second cards from one hand to the other.
Example: you have HAND #1 K - 4 & HAND #2 7 - A, you can switch to have HAND #1 K -A BJ, & HAND #2 7 - 4 and double down. This is the good news. The draw backs are even money BJ & dealer pushes on 22. They also have a Super Match side bet, I wasn't to crazy about that.
You can download a for fun version at www.blackjackswitch.com I have not tried it on a live table yet, may try it next time I'm out in Vegas. Has anyone out there tried it yet and what did you think?