Speaking as an ex-office receptionist (amongst other jobs) and also an ex-office cleaner (working for myself) leaflets wont work if the receptionist gets them as they get binned, ( i know, ive done this myself, it was simply just not worth the bother of getting up the nose of the powers that be by troubling them with advertising) and as an office cleaner i made sure any cleaning leaflets that came through the door whilst i was there were binned.
You need to make sure it reaches the right person...
Cheers
Bertie