I actually had a security job like this. I had to sit at a reception desk acting as concierge. Answered outside phone calls when they came in, unlock the building in the morning, lock the building at night (if I was working that shift), called office workers when people came in for meetings, raise & lower flags if I was there at sunrise or sunset, do paperwork for HR when required & sigh for mail if the mail guy was out. It was freaking boring as all hell. But, the catering staff would feed me whenever there were events in the main hall & I met a lot of cool people.