Gropii is a hot tub game best played with 5-8 people. Each round, one player is 'it' and starts by putting one of their knees out in the middle of the tub (under water, preferably with plenty of bubbles to decrease visibility). The 'it' player then averts their gaze upwards while everyone else in the tub places a hand on or around their knee. If the 'it' player can feel multiple hands, they say so, and the other players adjust by removing hands, until eventually only one hand remains. The 'it' player then guesses whose hand remains. If he or she guesses incorrectly, the person who was guessed pulls their hand out of the tub. If the guess is correct, the round ends and the next player to the left becomes 'it'.