Well you actually have a very road choice. The lower casino levels forma fabulous multi-world gambling complex. You have your standard environments, of course, but they also have the likes of an area with an atmosphere poisonous to humans but breathable by most aliens, an underwater area for aquatic species, and even a super-low pressure area for aliens unsuitable for standard atmospheres. All of which are in in fabulous gold and red, though with a little more dignity than the pulsingly loud pleb level you are currently on.
In turn, each of those areas is split into several different stylistic areas- one for the more spectator-y events like roulette and craps, one for the more socially intense card games like New Pazaak (which is basically baccarat in this game- the 'new' part of 'New Pazaak' being when they dropped the collectible element of it thousands of years ago), and one area where they hold some of the more skill-based Poker equivalents, though to make any money off of those they level hefty entry fees to play.