More people than I can count. There's the founding members, me, Superman, Batman, Wonder Woman, Flash, J'onn, and John. After the Thanagarian invasion, they gained a lot more members. We're talking dozens of superheroes. There's Black Canary, Green Arrow, Vixen, Vigilante, Aquaman, Zatanna, Supergirl, and Stargirl to name a few. We've got plenty more other than them.