Everyone who wants in has to ante up. The last person at the table gets the pot. Whenever it is your turn, pick a "beverage", and drink. If you don't drink, can't drink, obviously cheat, or can't keep it down until at least your next turn, you lose and have to leave the table. Once you touch a drink, it's seen as bad form to put it back. Have fun!
The drinks are a mix of botched potions, gross fluids and literal poisons. That said, you might be able to find an antidote next round! But probably not.
Using this tool: "Refresh Yourselves" to load a new table, each drink has a button next to it when it is drunk and replaced. The players will only see the second list, but are allowed to sniff, scry, mix, dilute and panic as much as they want.