The High Rollers Lounge, at the Max's cat track, is a high end place for those special players.
You just need to be a VIP member to get into the lounge.
Unlike normal walkthroughs, in Nice Game Hints you can select just the puzzle you want hints for. Here are listed the puzzles for "High Roller's Lounge" in Grim Fandango. The guide you choose only contains information about that puzzle, reducing possible spoilers for other puzzles.