When we went to MGM last year on an early magic hour day, we were allowed to enter the park but had to wait at the velvet ropes. There were CM's waiting for the clock to read 8:00. They played the "hurray for hollywood" music before they let the rope down. There was a lot of anticipation from the crowd. They gave us some rules like no running down the CM's to the Tower of Terror and such, but it was fun!