Not sure if the OP is a chess player, but four person chess is pretty fun.
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Set up four boards, each person sets up on a side, and it's every player for themselves.
Just played this last weekend. Solo play is fun, but I really liked playing as a team. We played it where you had to knock out both opposing kings to win, but all other pieces were still in play until both kings were taken.
The strategy of playing freely without having to protect your own king was pretty fun. My queen became a ruthless assassin after her husband was killed.