Different casinos may have different dress codes. There are many casinos which cater for a more sophisticated market. The shows and entertainment ensure that the entire atmosphere is more glitz and glamorous as opposed to casual wear. Depending on where you are going, it is going to be worth your while to try to fit in with the dress code. After all the last thing that you want to do is look out of place, especially if all you want to do if have a good time and fit in.
For females you could consider wearing a denim jacket but it needs to be worn in a smart way over something sophisticated. If you choose to wear a denim jacket it needs to be worn in the correct manner if you are going to go out for a night at the casino. Instead of wearing a pair of running shoes, jeans and a denim jacket, rather choose to wear it in a way that makes it look stylish. For example you could wear a dress with heals, great earrings and a necklace to match. You could wear a very fitting denim jacket over your outfit. If worn in the right way it could be pulled off.
Although there is nothing against wearing a denim jacket to a casino, it all about the way that you wear it and what you choose to wear it with. You want to be appear smart and fit into the gambling environment. At many casinos there are people with high end jobs and lots of money going around, they usually choose to dress to impress.Although you don’t need to dress up too much, you should for your own sake try to dress in order to look smart and fit in. The outfit you put together can be casual but more towards the casual formal side.