Don’t wake the diva! That’s what Liza Minnelli‘s personal assistant was told after she was locked out of their two-bedroom suite at the Westin St. Francis in San Francisco. According to our source, the assistant’s automatic key card was disabled when the hotel’s computer system shut down temporarily. “Minnelli staffers pleaded with the assistant and hotel security to avoid knocking as Liza was sound asleep inside,” the source said. After 45 minutes, the key card was rebooted and the assistant entered without waking Minnelli, who performed a sold-out show the next day at Davies Symphony Hall.