We hold ours at the football stadium. If it rains then we have a problem. Have to go inside with each graduate getting 3 tickets for family. When there are families that want to bring everyone from mom and dad to their 25th cousin then it chaps some of them, especially of they drove from Guadalajara to be there.
My girl’s was held at Blossom Music Center. Plenty of seats, and under a canopy roof. Great sound system. Very enjoyable. She was valedictorian. Not my biological daughter, but man was I proud of her! College at 16!