I always kind of wanted to live in an Institute. Or not an actual Institute, really, but one of those concrete modernist buildings with a jutting diagonal and a lot of tinted glass? The kind that kind of looks like it could be an Institute.
There's a lot of houses around here that have that look.
If I lived in a place like that, I'd sink a dull brass-composite plaque in the front facade that says CENTRAL CALIFORNIA INSTITUTE AGAINST MATTER AND ENERGY. The entrance would be a tinted glass door in a tinted glass wall. There would be a security box with a steady red light on the inside of the glass wall, attached to the door lock. You couldn't get in. You're not authorized.
Beyond that shatterproof glass barrier, in the reception lobby, you could see a round reception desk with a terminal and an empty chair.
Business hours would not be posted, but if you went to check out the website, you'd have considerable cause for alarm.