After the opening credits, Albert is giving a tip, but the handover was messy and it drops to the ground, but they continue the scene.
At about 28 minutes, an outside shot of Cadillac Jack's is shown. Cadillac Jack's is at 9457 San Fernando Road, Sun Valley, California, in the suburbs of Los Angeles and is used as a retro movie set. There is no Cadillac Jack's in Las Vegas.
The casino is crawling with cameras. The crew were together outside, walking through the door together, standing in the main game area. They would quickly be recognised as soon as they started the con.