[waffle]

Spades. Especially with a good balance of sandbag/nil/blind nil rules and payoffs. A group I played with also allowed a '10 for 2': If the second person of a team to bid makes their team's bid '10 for 2', then they will get +200 points if they take exactly 10 tricks, and -100 for any other number. Kind of gimmicky but it was fun.

Isn't spades just bridge with training wheels, though?