A “mush” is a house rule not sanctioned by the league. It is a non-compulsory exchange of tiles after the Charleston optional across pass. Players who choose to participate place tiles to be exchanged in front of their rack, upside
Wall Game Variations with Money (Article ID 155)
There is a common house rule is called, “Wall Game Kitty.” Here’s how it works:
Purse is Empty, also known as PIE (Article ID 145)
A “pie” is a limit set by players. Players start with $5 in coins to pay the winner.
The League on Table Rules (Article ID 50)
The NMJL does not support house rules because they feel they are not conducive to the game and may lead to arguments.