Cal Poly a cappella ensemble That’s The Key will perform its Spring Concert at 7 p.m. Friday, May 8, and 6 p.m. Saturday, May 9. That’s the Key has performed at numerous events this academic year, including the San Luis Obispo Farmers Market and Alpha Kappa Psi’s charity ball for clean drinking water around the world. The ensemble also competed in the International Competition of Collegiate A Cappella Quarterfinals in San Diego in January. Admission at the door will be $5. Proceeds will go toward the group’s competition and travel fees for next year.