After the Nightclub job begins, go to the main objective (a safe), and break it open. If you have explosive charges, you can use them to speed up the process. If not, you can use the normal drill. Once the safe is open, take the money inside, and bring it to the poker table downstairs. The poker table is in a small side room behind the kitchen. Put the money on the table to get the "I'm Going All-in!" achievement. Note: The money bag does not have to stay on the table, it just needs to touch it for a short moment.