Quick rules
32 cards: A K Q J 10 9 8 7 in each suit, but the 7♠ is replaced by the Joker, the strongest card in the game. You and your partner (top) are Us, and the two opponents are Them.
Play goes anti-clockwise. Bidding starts right of the dealer and the dealer bids last. Each player bids once: pass, or bid 5–8 (higher than the current bid). If everyone passes, the Joker holder is revealed and Forced.
The winning bidder picks trump. You must follow the suit led if you can. The Joker can be played on any trick (and always wins it) but may not be the first card of a trick, unless it's your last card.
Scoring (one shared counter): Forced 5 / 5 · 5: 5 / 10 · 6: 6 / 12 · 7: 7 / 14 · 8: 8 / 16 (made / failed: failed points go to the other team). Us push the score to −32, Them push it to +32. The team that's behind deals.