system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:How does a casino make money from a poker game? Every other game is played against the casino - with the odds stacked in the casino's favour. But in poker players complete against other players.

Do you pay to sit at a table?

[Edit] Many thanks for all this information.
gpt
There are basically 2 ways. 

1. Most casinos take a 'rake' from each hand which is generally 3 - 10% of the pot. It is usually capped so big pots don't make them a lot more.

2. For tournaments and at some casinos there is a simple fee to enter or to play for a period of time.

I guess the third is that by bringing people in to play poker they will generally also spend money elsewhere, whether it is gambling or just buying food and beverage etc.