Best explanation I can come up with: it's like bingo with playing cards. Except you uncover things instead of covering them up. Everyone brings a $5 gift and the winners get to choose something to take home. It's fairly easy to play (if you pay attention) and the point of the evening is to eat and socialize, whether you win or lose.
Tonight was not my night for Pokeno and I came home empty handed - boo! hiss! Oh well, maybe next time!