Ace-King Bingo

I've seen a cute blackjack promo at a couple casinos that I guess have been around for years but I only recently learned of it. They post a board with 16 squares, I guess you'd call it a grid, with the four suits of Aces by the four suits of Kings. During the promo time a player getting dealt an Ace-King announces it to the dealer/floorman and they mark it off on the appropriate square. A single square typically gets maybe $20-$25, a square that completes a row might get $50, a square that completes two rows might get $100, and then if the board is blacked out the player holding the last Ace-King gets a pretty good blackout prize. Of course, if you get an Ace-King and that square has already been hit by someone else, you don't get nothing, naturally.

I've seen this at a couple casinos in California. I'm wondering if it is unique or has anyone seen this kind of promo around. It's not a bad promo for a small stakes player and since I am kinda new to blackjack and also kinda new to playing anything when the sun is up, I guess I've been in the dark about this.