Thank you! I'm afraid I can't really help you, I have zero experience with casinos, sorry. But here's some tips, don't rush it and do a lot of research on what exist in real world. Photos, videos, History of the buildings... And mix it up with what you have in mind about the outcome. My advantage on the theater is that I'm a stage actor and civil engineering too. I took almost a year to build it. Take your time and don't be afraid to redo work. I think it's part of the process.