Spending a semester at another school

[AbaNader]

I am leaning on accepting my offer at Johns Hopkins, however, the small faculty size is troubling. If I can't find classes I am interested in or I am saturated in terms of what I can learn from the department, do departments usually have mechanisms in place to allow students to spend a semester or two or dual enroll at a "partner" institution?

I know Harvard/MIT have something like this but I wanted to know if it is common before I shoot an email to the department.

Thanks!