For casino - long pants and short sleeve shirt will be enough. I saw a bunch of quite noisy mainland china in shorts and panamas - they were allowed to be. Hi, What is the latest with regards to dress code for men. When I was at Marina Bay Sands Casino last week, there was a huge variety of clothing worn. Answer 1 of 6: Hi, Would like to know what the dress code is at the MBS Casino, are mens shorts, neat casual shirt, short socks and sneakers suitable to gain.