Join another high school’s club/extracurricular activity?

My high school doesn’t have any science or math-related club at all. I tried starting one but since most of the students at my school are athletes and practice every day from 3-6, no one really has the time to join clubs.
Since I go to a private religious school, do you think I can join the science and math club at the public high school where I live?

Probably not, at least in NY. Even home schooled students have a hard time participating in public school activities.

Contact the public school and ask but I think it is unlikely.

Can you hold your class over lunch time?

Also, it is okay if you don’t have any math/science clubs. Get involved in something and then get some leadership.