The Men's Gym on the campus of UCLA, now known as the Student Activities Center, is a 2,000 seat multi-purpose arena in Los Angeles, California. It opened in 1932. It was home to the UCLA Bruins men's basketball teams until Pauley Pavilion opened for the 1965-1966 basketball season. It was informally known as the "B. O. barn." In 1955, the Los Angeles city Fire Marshal declared the building unsafe for a crowd of greater than 1,300. UCLA Basketball games then also were played at the Pan-Pacific Auditorium, the Los Angeles Memorial Sports Arena and other venues around Los Angeles.