Taking a rake in poker refers to the percentage of the pot that the house takes in compensation for hosting the game. Why did Molly take a rake in Molly's Game? According to the film Molly's Game, Molly Bloom started raking her games to pay players out.

In many live poker games, the rake will be set at anywhere between 2% (which is great) to 10% (not so great). However, there is also something called the rake cap. The rake cap determines the maximum amount of money the house can take from a pot.