On the last Monday of every month, Diamond Brooklyn in Greenpoint hosts a shuffleboard tournament exclusively for doubles. It's just $3 per person to enter or $6 for each two-person team. When there are at least eight teams, you'll have the chance to win the grand prize of $100 that you can split with your teammate. Or not? Also, if you're more intrigued by fame than cash, winners will be immortalized on a plaque on Diamond's wall. R.S.V.P. to reserve a spot.