I know it isn’t what you were going for, but a Wii is pretty darn fun, and can offer many games in a small space while changing over time. A foosball table will always be a foosball table.
A regular card table is nice, too, for board-games, cards, Yahtzee, etc.
Consider a bumper-pool table. Needs less space than a regular pool table and doubles as a card-table.
