Deal 9 cards to each player, leaving the last two face down. (These leftovers are called the "widow" in some games.) That means that a complete set of 9 can't be completed for two of the sets in the game. A player can call a corner while holding 8 cards if he willing to gamble that the 9th is out of play. After corner is called, check to see if the 9th is in the widow. If it is, the score is as normal. If it's not, the person holding it gets a bonus (+20) and the person calling the false corner gets a penalty (-20).
We always played with spoons. In the middle of the table, one fewer spoons than the number of players. Once somebody gets a corner he quietly picks up one spoon. As they notice, other players pick one up until there are none left, leaving one player out. Everyone with a spoon gets 20 points. Note that it's excellent form to continue to pretend to trade after you've picked up your spoon, leaving the unobservant desperately trying to improve his hand while everyone else snickers behind their cards. Double hilarity if two players continue to trade with one spoon left on the table.