It really depends on where you live. In Florida we have the "Tim Tebow Law", which requires secondary schools to allow homeschoolers to participate in extracurriculars and interscholastic sports and to allow homeschooled students to enroll part-time in "specials" at the school that they would ordinarily attend if enrolled in the district, and permits elementary schools to do the same. So drama, sports teams, chorus, etc. are available to homeschoolers here.