Grab your crew, your costume, and your thirst—The Boo Ha Ha is back! This one-night-only haunted Oktoberfest takes over the OC Fairgrounds with unlimited craft beer tastings, live music, food trucks, and creepy surprises. Come for the brews, stay for the scares—and don't forget the costume contest. It’s the ultimate 21+ Halloween bash in Costa Mesa! Book a room.