I had a similar situation working for a corporate company. (Ground floor building reception) Saw an HB 7 sitting on reception who always looked bored. I didn't know how to approach as there was no real reason to make the slight detour over to her desk before going up the lift to my work floor.
I decided to play "naughty boy" pretending that I had lost my key card to get through the gates. This meant I had good reason to approach her as she would have to issue me with a temp card for the day. Said something to the affect of "I was gonna be cheeky and jump the security barrier but then I saw you here".
This allowed for an easy conversation starter for when I entered work the next day. So maybe try that
