Both the Marriotts in Cairo had some hefty security. They had armed security with dogs checking all cars driving up (and even had mirrors to check the underside of the cars as well. There were also armed security guards throughout the hotel public areas and they had metal detectors and baggage x-ray machines for anyone entering the building.

Note that this wasn't just a Marriott thing. We also stayed at the CityStar InterContinental. It had similar security before you could drive a car up to the main hotel building.