Mario Morales Coliseum is an indoor sporting arena that is located in Guaynabo, Puerto Rico. It used mainly for basketball, but it can also be used for table tennis or volleyball. The coliseum's seating capacity is 5,500 seats. Apart from the Guaynabo Mets' home games, the coliseum is also used for boxing, roller derby and musical acts. It features a large painting of Mario Morales on the entrance.