Fire alarm sounded at approximately 11:40 p.m (wife and I were already asleep), and guest were ordered (via loud recording) to evacuate to rally point at rear parking lot. There was no staff to direct, advise, or perform guest accountability at ANY time during the alarm. And while guest were ordered to evacuate, a party of an estimated 100 guest was taking place on the property, yet none of these people were ordered to evacuate. Staff NEVER gave an all-clear, or ANY direction whatsoever regarding the alarm. After some time had passed (approx 45 minutes) and no emergency services of any kind showing up at the property, guest simply meandered back to their rooms, as did we, only to find that the flashing strobe light continued to flash within the room until approx. 1:40 a.m, by which time our hopes for a restful stay were shattered. Had this been a real fire or other emergency threatening life and limb, I believe that people would have died, due to the staff's indifference and complete failure to take command of the situation. Upon checkout, I made my dissatisfaction known to the morning staff, who offered a verbal apology and nothing more. Paying close to $200 a night for a room carries an expectation that the property and its staff would be professional, safety-minded, and perform to the highest industry standard; Sheraton Cerritos FAILED in meeting that expectation. If you value rest, safety, and customer service, DO NOT STAY at this hotel.