After the JLA was founded in 2004, Robin were a bit miffed that she couldn't join due to her age, so Bryce Wayne pocketed up some money to build a "clubhouse"/training center for her, that also gave Beast Girl and Victoria Stone (who had just become Cyborg) a place to crash. Raven showed up soon thereafter, needing friends and heroes to ally with to stop his mother. Within the first year, Starfire also joined.
