Per Natalie Walker. Cluster concert with HPMS and HPHS Choirs performing. Concert begins at 7:00 pm in the Palmer Auditorium. Stage set all day with risers; HPHS Choirs rehearse before school at 7:00 am and continue onstage during classtimes. HPMS Choirs work with a clinician on stage from 4-6 pm.