Id highly recommend you add in a tab to use emojis in the chat box of your casino. Emojis are a great way for chatters to convey emotion, and I like to use them whenever possible, especially when Im trying to do something for entertainment like in gambling. I dont use the chat box of casinos often, but its always interesting to speak to other people online and talk about their experiences on the site.
Adding emojis in the chat box can be another good advice because people want to express their feeling in the chat. Perhaps, activating private chat for each member will be a good suggestion too because they can share something privately. But I guess that you can find more functionalities in the admin chat setting, or you can modify from the source. But you need to try by yourself to use the chat box, so you know what more to be added in the chat box.