You and your group of fellow masterminds can choose from morning, afternoon, and evening sessions (click the Important Info tab for schedules).
Once you are in the room, you have one hour to find and take as much cash as you can before the cops show. First timers don't need to be intimidated: Dealers (aka escape room employees) give clear instructions at the start of the game. From there, it's a race against time to solve clues and riddles.
If you play your cards right, you might end up winning the game, not to mention the respect of the mob.