Hobbies mostly develop based on what you are exposed to as a child. Its why rich people have rich people hobbies and poor people have poor ones generally. Rich hobbies generally involve travel, prior expenses, (as you said) and a lot of time, while poor ones are usually easy to pick up and quick enough that you can squeeze it in whenever you have time.

Blacks primarily live in urban sprawls in poverty. So they will default to hobbies you can do there, like basketball or things you can do with just a group of niggas standing in a circle (like rapping).