I know it can be done under one gym. But a lot of TMA school don't embrace fighting as a healthy thing. For me I embrace fighting and violence in general. Fighting and violence shouldn't be treated as a disease that humans have. Like everything else, there's just a positive way to do it that allows growth and a destructive way to do it that causes misery. Most TMAs go down that "less violence" path where I tend to embrace it and provide an outlet for people to better manage it to the point where they don't feel like they need it but know that it's there in the event that they do.If you want to get in shape you get in shape. If you want to fight you fight. If you want a social group it's a social group.
Fighters and hobbyists are the same people.
If you think you can't have all of that in one gym you are striving to be mediocre.
We all know how to punch someone in the face really hard. But it's not something we feel like we need to do, But it's there if we need to use it.