What is the ruling on donating to "Orphan's Day" if it involves reprehensible acts such as mixing of genders (اختلاط) and music, even though its purpose is to bring joy to orphaned children?

Giving charity to an orphan is religiously desirable, and bringing joy to their heart is a cause for softening and humbling the heart. However, it is not permissible to attend gatherings where forbidden acts are committed, such as music and immodest display, even if the purpose is to donate. It is not permissible to sit with people who commit evil, except out of necessity. Furthermore, charity to orphans is not limited to a specific association, and charitable organizations are not permitted to raise orphans in ways that involve forbidden acts.