An electronic gaming machine performs operations comprising: (i) receiving, from a first player of the electronic gaming machine, a first credit contribution; (ii) receiving, from a second player of the electronic gaming machine, a second credit contribution; (iii) aggregating the first credit contribution and the second credit contribution to create a combined credit balance; (iv) determining, based on the first credit contribution and the second credit contribution, a relative contribution of each of the first player and the second player to the combined credit balance; (v) determining, in response to at least one mutual wager, at least one outcome of the wagering game; (vi) one of incrementing and decrementing the combined credit balance based on the at least one outcome; (vii) receiving, from at least one of the first player and the second player, an instruction to cash out of the wagering game; and (viii) distributing a pro rata share of the combined credit balance to the at least one player in proportion to the relative contribution of the at least one player.